FORCE AND MOTION
Scalars vs. Vectors
Scalars| Vectors|
A scalar quantity has only magnitude.| A vector quantity has both magnitude and direction.| Scalars can be added, subtracted, multiplied and divided just as ordinary numbers, i.e., scalars are subjected to simple arithmetic operations.| Vectors cannot be added, subtracted and multiplied following simple arithmetic laws. Arithmetic division of vectors is not possible at all.| Example: mass, volume, time, distance, speed, work, temperature| Example: displacement, velocity, acceleration, force| Distance and displacement

Distance is defined as the ground covered by a moving object during its motion. Its SI unit is metre (m). It has only magnitude, but no direction. Distance can never be negative. The minimum value of distance is zero. Displacement is defined as how far an object has moved relative to the starting point. Its SI unit is metre (m). It has both magnitude and direction. Displacement can be positive, negative, or zero. Speed and Velocity

Speed is a physical quantity that enables us to know how the position of an object changes with time, i.e. speed gives us an idea about the slowness and fastness of a moving object. It is obtained by dividing the distance travelled by a body by the total time taken to cover that distance. speed =

i.e.,
where, s = speed of the moving object
d= distance travelled by the object
t = time taken to cover distance s
The SI unit of speed is m/s.
The speed of an object tells about its fastness or slowness. It does not give us any idea about the direction of its motion. The physical quantity that gives the speed of a moving object with its direction of motion is called velocity. The velocity v of a moving object is given by the ratio of distance d travelled in a given direction, i.e., the displacement with the time taken t. ∴Velocity =

Magnitude of velocity,
Acceleration---The rate of change of velocity of a moving object is called acceleration. An...

...JPN Pahang
Physics Module Form 4 Chapter 2 : Force and Motion
2. 2.1 1.
FORCE AND MOTION ANALYSING LINEAR MOTION Types of physical quantity: has only a magnitude (i) Scalar quantity: …………………………………………………………………. has both magnitude and direction (ii) Vector quantity: ………………………………………………………………… The difference between distance and displacement: length of the path taken (i) Distance: ………………………………………………………………………… distance of an object from a point in a certain direction (ii) Displacement: …………………………………………………………………… Distance always longer than displacement. Example: The following diagram shows the location of Johor Bahru and Desaru. You can travel by car using existing road via Kota Tinggi, or travel by a small plane along straight path. Calculate how far it is from Johor Bahru to Desaru if you traveled by: a. The car b. The plane Kota Tinggi 41 km 53 km
Distance and displacement
2.
3. 4.
Solution: a. b. by car = 41 + 53 = 94 km
Johor Bahru
by plane = 60 km
Desaru The path traveled by the plane is shorter than travelled by the car. So, Distance = 94 km Displacement = 60 km
60 km
Hands-on Activity 2.2 pg 10 of the practical book. Idea of distance and displacement, speed and velocity. Speed and velocity 1. 2. 3. 4. the distance traveled per unit time or rate of change of distance Speed is ..………………………………………………………………………………… the speed in a given direction or rate of change of...

...For other uses, see Force (disambiguation).
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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
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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...

...Unit 1 Forces and Motion: Dynamics
ARE YOU READY?
(Pages 2–3)
Knowledge and Understanding
1.
Scalar quantities include distance (metre, 5.0 m), time (second, 15 s), mass (kilogram, 65 kg), and frequency (hertz,
60 Hz). Vector quantities include velocity (metres per second, 15 m/s [E]), displacement (metre, 6.5 m [S]), acceleration
(metres per second squared, 9.8 m/s2 [down]), and force (newton, 25 N [forward]).
2. (a) Both masses will hit the floor at the same time since the speed at which an object falls is independent of mass, and is
related only to acceleration due to gravity (neglecting air resistance).
(b)
(c) m = 20 g = 0.02 kg
Fg = ?
Fg = mg
= (0.02 kg)(9.8 N/kg [down])
Fg = 0.2 N [down]
The weight of the 20-g mass is 0.2 N [down].
(d) One example is the force of Earth pulling downward on the 20-g mass and the force of the 20-g mass pulling upward
on Earth.
GM E mMoon
The magnitude of the force of gravity between Earth and the Moon depends linearly on the masses of
3. FG =
r2
Earth and the Moon, and depends inversely as the square of the distance between the centres of Earth and the Moon.
4. (a) Kinematics is the study of motion (e.g., analyzing motion with constant acceleration). Dynamics is the study of the
causes of motion (e.g., analyzing forces by applying Newton’s three laws of...

...
FORCE AND MOTION
Ronald Steven DuBois
5th Grade
St. Michael's Catholic School
2009
TABLE OF CONTENTS
1. Abstract
2. Introduction
3. Background Information
4. Procedure
6. Data and Observations
7. Results
8. Conclusion
9. Bibliography
ABSTRACT
I thought it would be fun to fling things like raw eggs and rocks with a catapult. Guess
what, it was! By flinging these items I tried to find out if heavier things would travel farther than
lighter ones. Basically how force effects motion.
With the catapult as the force, I sent items soaring, after weighing them, and then
recorded how far the items travelled. This showed me how Newtons Three Laws of Motion
work.
Force causes change is Newton's First Law of Motion which I saw from the catapult
flinging the items.
My hypothesis that heavier items would go farther was not correct, because Newton's
Second Law of Motion says that the force applied is equal to mass times acceleration. For
instance, if you push a skateboard it will roll away, but if you push a car with the same amount
of force, it will barely move. So heavier items do not travel farther.
Newton's Third Law of Motion is that for every action there is an...

...„throwing“/“putting“(throwing in a pushing motion) a heavy spherical object (the shot) as far as possible.1 The shot put has ancient origins in strong man competitions, in which stones were originally thrown instead of metal balls.
We have found that force of gravity, and acceleration play a role to a flying object. Force of gravity affects the object vertically while force of acceleration may differ between how the object is being thrown. In fact, it will always change unlike force of gravity. These forces affect everything we do, from walking to class to passing a pencil to a friend. In relation to everyday life, there is a clear connection to many kinds of sports. Projectile motion can be applied to any object due to the forces the athletes apply on it. By knowing these forces, it gives the athlete an advantage to know where the object might be later on. For example, from a athlete’s perspective, acquiring experience from becoming more intuitive with an objects motion will aid him or her in knowing how far the object might travel. The athlete will know how much force to apply on the object to score a goal. Of course the athlete cannot calculate the exact amount of force during a game so the athlete will have to use instinct and previous experience to estimate how much force to apply to...

...2 page essay
“How does Motion and Forces help your everyday life?”
All your life, forces has been acting on you even though you probably didn’t notice it. When you use your pencil, type, walk, or even when your doing something your using force. Those were a few examples of everyday life because, that’s what a force is “everyday life”. Everyday you use force to make your life easier.
The correct definition of “Force” is a push or a pull. I’ve always remembered that. For an example, when your doing homework you use a force on your pen or pencil because you push and pull it across the paper. Sometime two forces act on something at the same time, that’s called net force. If two people were pushing a shopping cart and they were pushing in the same direction, you would add the two forces together.
Net force is an unbalanced force, an unbalanced force is a force that changes the object’s motion or causes it to accelerate. Something else can happen if two forces move in one direction. If one force is more powerful then the other, they will not balance out to zero net force because , one force is stronger than the other, so the weak force is not...

...letter of the BEST answer
____ 1. The attractive force, between the earth and a body.
A) force B) distance C) mass D) weight
____2. The acceleration of a body when it falls freely at the surface of the earth (about 9.8 meter/sec2) or (32 ft/sec2) is due to:
A) acceleration B) acceleration due to gravity C) average speed D) distance
____ 3. An airplane is observed to travel a distance of 300 miles in two hours without changing its rate of speed. What is its speed?
A) 200 mi/hr B) 175 mi/hr C) 150 mi/hr D) 195 mi/hr
____ 4. If you drive your car at a steady speed covering 100 miles in 1.5 hours, what was your speed?
A) 46.2 mi/hr B) 57.9 mi/hr C) 66.7 mi/hr D) 49.7 mi/hr
____ 5. A mosquito flying at an incredible 10 meter/sec becomes blind and collides against a wall (zero speed) in a matter of 1/2 sec. What is the deceleration of the mosquito during this tragic period of time?
A) 11 meter/sec2 B) 15 meter/sec C) 20 meter/sec2 D) 17 meter/sec2
____6. What is the acceleration of a bird which is observed to change constantly its speed by 5 ft/sec every 4 seconds of time:
A) 1.25 ft/sec2 B) 2.25 ft/sec2 C) 1.025 ft/sec2 D) 5.10 ft/sec2
____7. What acceleration do you expect to impart to a block of mass 2.5 slugs resting on a frictionless plane if you push it with a force...

...What is Force?
In physics, a force is any influence that causes an object to undergo a certain change, either concerning its movement, direction, or geometrical construction. It is measured with the SI unit of newtons and represented by the symbol F. In other words, a force is that which 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 which can cause a flexible object to deform. Force can also be described by intuitive concepts such as a push or pull. A force has both magnitude and direction, making it a vector quantity.
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 the object is constant, this law implies that the acceleration of an object is directly proportional to the net force acting on the object, is in the direction of the net force, and is inversely proportional the mass of the object. As a formula, this is expressed as:
where the arrows imply a vector quantity possessing both magnitude and direction.
Related concepts to force include: thrust, which increases the velocity of an object; drag, which decreases the velocity of an object; and torque which produces changes in rotational speed of an object....

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