T = W - FB where T is the weightof the Al and FB buoyant force due to thealcohol T = ρAl V g - ρE V g =(ρAl - ρE) V g =(ρAl - ρE) * 10E-4 *9.8 converting the volume to m3

Using 2700 for the density of Al and 790 for the density ofethyl alcohol

T = 1910 * 10E-4 * 9.8 = 1.87 N

A wood block with a density of 700 floats in water.
What is the distance from the top of the block to the water if the water is fresh? (a) density of fresh water is ρ_water = 1000 kg/m³ ΣF = 0
- (ρ_wood)g(V_wood) + (ρ_water)g(v_wood) = 0 (v_wood)/(V_wood) = (ρ_wood)/(ρ_water) (10 * 10 * h)/(10 * 10 * 10) = (700)/(1000) h = 7 cm the distance from the top of the block to the water is 10 - 7 = 3 cm (b) density of seawater is ρ_sea = 1030 kg/m³

(v_wood)/(V_wood) = (ρ_wood)/(ρ_sea)
(10 * 10 * h')/(10 * 10 * 10) = (700)/(1030)
h' = 6.79611 cm the distance from the top of the block to the water is 10 - 6.79611 = 3.20389 cm

The container shown in the figure is filled with oil. It is open to the atmosphere on the left. By the known formula,
presure = P = h dg
h is the level of height of the water column
d is the density of the oil
g is the acceleration due to gravity
(a) presure at A : P_A = h d g = (0.5m -0m ) (900 kg/m^3)(9.8m/s^2)= 4410 Pa (b) presure between B and A = P_B - P_A = hdg = (0.5 m - 0 m )(900)(9.8)= 4410 Pa

(c) presure betwewn C and A = P_C - P_A = hdg = (0.5 m - 0 m )(900)(9.8)= 4410 Pa

What is the gas pressure inside the box shown in the figure? Height difference between gas and mercury h = 16 cm –6 cm = 10 cm = 0.1 m P = Po + Dgh Where Po= atmospheric pressure = 1 atm = 101.3 * 10 ^ 3Pa D = mercury = 13600 kg / m^ 3Plug the values weget P = ( 101.3 * 10^ 3 Pa) + (13328 Pa) = 114628 Pa (101325 Pa - 13328 Pa)=8.8*10^4 A 1.2-m-diameter vat of liquid is 2.4 deep. The pressure at the bottom of the vat is1.2 . What is the...

...Force & Motion
Isaac Newton – English physicist & mathematician.
Newton’s First Law of Motion(Law of Inertia):
An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalance force.
An object at rest tends to remain at rest. An object in motion tends to move at a constant speed in a straight line unless acted upon by an unbalanced externalforce.
Newton’s Second Law of Motion(Law of Acceleration):
An object’s acceleration is directly proportional to the net force acting on it and is inversely proportional to the object’s mass.
Newton’s Third Law of Motion(Law of Interaction):
For every action, there is always an equal and opposite reaction.
Force is any interaction which tends to change the motion of an object. It can also be described by intuitive concepts such as a push or pull.
Unbalanced Forces
An object is said to be acted upon by an unbalanced force only when there is an individual force that is not being balanced by a force of equal magnitude and in the opposite direction.
Direct proportion- means that when one factor increases, the other factor also increases and vice versa.
Inverse proportion- means that when one factor increases, the other factor decreases.
Acceleration- increase in the rate or speed of something....

...HYDROSTATIC FORCE (EXPERIMENT 1)
INTRODUCTION
The determination of force which are exerted by liquid which are at rest on surface immersed in liquids. From the study by hydrostatic, the following principles have been established :
a) There are no shear stress present when the fluid is not in motion.
b) The pressure exerted by a fluid under hydrostatic conditions. This pressure acts perpendicular to an immersed surface.
c) Hydrostatic pressure various linearly, increasing with an increase in depth.
OBJECTIVES
1. To determine the hydrostatic thrust on a plane surface partly immersed in water.
2. To determine the position of the line of action of the thrust.
3. To compare the position determined by experiment with the theoretical position .
4. To verify the formula for calculating hydrostatic thrust.
THEORY
When the quadrant is immersed in water it is possible to analyze the forces acting on the surfaces of the quadrant as follows:
The hydrostatic force at any point on the curved surface is normal to the surface and therefore resolves through the pivot point because this is located at the origin of the radii. Hydrostatic forces on the upper and lower curved surfaces therefore have no net effect – no torque to affect the equilibrium of the assembly because all of these forces pass through the pivot.
The forces on the sides of the...

...Definition of Force
A force is a push or pull upon an object resulting from the object's interaction with another object. Whenever there is an interaction between two objects, there is a force upon each of the objects. When the interaction ceases, the two objects no longer experience the force. Forces onlyexist as a result of an interaction.
Velocity, Acceleration, Momentum, and Impulse
Velocity, in physics, is a vector quantity (it has both magnitude and direction), and is the time rate of change of position (of an object). However, quite often when you read ‘velocity’, what is meant is speed, the magnitude of the velocity vector (speed is a scalar quantity, it has only magnitude). For example: escape velocity (the minimum speed an object needs to escape from a planet, say); note that this can be easily turned into a velocity, by adding ‘in the direction radially out from the center of the planet’, and that this direction is sometimes implied (if not actually stated).
Velocity is a vector measurement of the rate and direction of motion or, in other terms, the rate and direction of the change in the position of an object. The scalar (absolute value) magnitude of the velocity vector is the speed of the motion. In calculus terms, velocity is the first derivative of position with respect to time.
The most common way to calculate the constant velocity of an object moving in a straight line is with...

...building at 5m/s. which statement is true after it is released?
*
A crate (80 kg) is hung in an elevator by a cord rated to withstand a tension of 1200 N. The elevator starts at rest and begins moving upwards until the cord holding the crate breaks. What was the acceleration of the elevator when the cord broke? Assume g = 10 m/s2
Top of Form
(T1R + W1E)/ mass |
Bottom of Form
Block 1 (4 kg) is located on the surface of a table. A hand pushes horizontally to the right on block 1 with a normal force of 16 N.
On a sheet of paper, draw the free body diagram for block 1 using the two-subscript notation from class. After completing the free body diagram, enter below each force and its x & y-components. Remember that the x-component is the "i" component and the y-component is the "j" component.
FORCES on BLOCK 1
Weight force on block 1 by Earth
W1E = 0 i + -40 j N
Normal force on block 1 by Surface
N1S = 0 i + 40 j N
Normal force on block 1 by Hand
N1H = 16 i + 0 j N
| You are correct. Computer's answer now shown above.
Your receipt no. is 161-8237 | Previous Tries |
What is the acceleration a of block 1?
a = 4 i + 0 j m/s2
Block 1 (m1 = 6 kg) and block 2 (m2 = 16 kg) are adjacent to each other on the surface of a table. Block 2 is to the LEFT of block 1. A rope pulls at an angle on block 2 to the right with a vertical tension component of 110...

...IB PHYSICS HL
Lab: Centripetal Force
BACKGROUND/PURPOSE:
*In this section of your lab write-up, be sure to include all equations and
background information
-For motion along a straight line, a constant net force F acting on a body of mass m produces a constant acceleration a, related to the force through Newton's law:
F = ma
-When the same object is moving in a circle at a constant speed, the acceleration of the object is given by the following equation:
a = v2/r
-In this experiment, you will use these two equations and some simple measurements to determine the unknown mass of a rubber stopper as it rotates in a horizontal circle around a fixed center point.
PROCEDURE:
The equipment that you will use is as follows:
-Glass tube
-Rubber stopper
-String
-Hanging masses (washers)
When the glass tube is swung in a small circle above your head, the rubber stopper moves around in a horizontal circle at the end of a string. The string is threaded through the tube and fastened to some washers hanging below. The force of gravity on these washers, acting along the string, provides the centripetal force needed to keep the stopper moving in a circle.
Before taking any measurements, get a feel for the apparatus. With only one washer on the end of the string to keep the stopper from getting away, whirl the stopper over your head while holding onto the string below the tube.
The mass of the stopper...

...For other uses, see Force (disambiguation).
Page semi-protected
See also: Forcing (disambiguation)
ForceForce examples.svg
Forces are also described as a push or pull on an object. They can be due to phenomena such as gravity, magnetism, or anything that might cause a mass to accelerate.
Common symbol(s): F, F
in SI base quantities: 1 kg·m/s2
SI unit: newton
Derivations from other quantities: F = m a
Classical mechanics
History
Timeline
Branches[show]
Formulations[show]
Fundamental concepts[show]
Core topics[show]
Rotational motion[show]
Scientists[show]
v
t
e
In physics, a force is any influence that causes an object to undergo a certain change, either concerning its movement, direction, or geometrical construction. In other words, a force can cause an object with mass to change its velocity (which includes to begin moving from a state of rest), i.e., to accelerate, or a flexible object to deform, or both. Force can also be described by intuitive concepts such as a push or a pull. A force has both magnitude and direction, making it a vector quantity. It is measured in the SI unit of newtons and represented by the symbol F.
The original form of Newton's second law states that the net force acting upon an object is equal to the rate at which its momentum changes with time.[1] If the mass of...

...Surface Tension Properties of Liquids
Introduction
The purpose of this experiment is to measure and record the surface tension of water and other aqueous solutions using capillary rise method techniques and practicing lab safety. In this laboratory the surface tension of water depends on the concentration of the following solutes; NaCl, acetone, and sodium dodecyl sulfate (SDS). Intermolecular interactions as well as other phases (solid, or air) make a liquid exist. The data collected will show that the surface tension of the liquid is proportional to its equilibrium. Surface tension of water dependant on concentration of NaCl, SDS, acetone, and distilled water all have different results. The different radius results are a consequence of the liquids surface tension and therefore its intermolecular spherical shapes
Background
The surface tension of a liquid depends on the properties of the liquid. For example, water is affected by the phases it comes into contact with (solid, air). A cylindrical tube is used to measure a liquids surface tension. Hydrostatic pressure of a liquid is equal to the pressure difference across the meniscus. An isotropic state is when other such molecules surround a mass of molecules in a pure liquid. A molecule that is not surrounded by many molecules is considered to exist at the surface boundary.
Procedure
For the first...

...How competitive forces shape strategy Pﬂicht 4. (5Forces)
"
1 von 3
While one some- times hears executives complaining to the contrary, intense competition in an
industry is neither coincidence nor bad luck.
Moreover, in the fight for market share, competition is not manifested only in the other players.
Rather, competition in an industry is rooted in its underlying economics, and competitive forces
exist that go well beyond the established combatants in a particular industry. Customers,
suppliers, potential entrants, and substitute products are all competitors that may be more or less
prominent or active depending on the industry.
- The weaker the forces collectively, however, the greater the opportunity for superior
performance.
T-he strongest competitive force or forces determine the profitability of an industry and so are of
greatest importance in strategy formulation.
There are six major sources of barriers to entry:
1. Economies of scale
—These economies deter entry by forcing the aspirant either to come in on a large scale or to accept
a cost disadvantage.
2. Product differentiation
Brand identification creates a barrier by forcing entrants to spend heavily to overcome customer
loyalty.
—> e.g. Softdrink Company
3. Capital requirements
The need to invest large financial resources in order to compete creates a barrier to entry
4. Cost disadvantages independent of size...