1. A car speeds up from 40 km/h to 55 km/h to overtake a truck. If this requires 15 s, what is the (a) acceleration and (b) distance traveled by the car?
2. Albert is riding his scooter at a velocity of 80 km/h when he sees an old woman crossing the road 45 m away. He immediately steps hard on the brakes to get the maximum acceleration of 7.5 m/square second. how far will he go before stopping? Will he hit the old woman?
3. the time a male bungee jumper if freely falling is 1.5 seconds (a) What is the velocity of the jumper at the end of 1.5 s?
(b) how high did he fall?
4. A juggler tosses three balls alternately vertically upward. each ball has an initial velocity of 5 m/s. (a) how high does each ball rise ? (b) How long will it take each ball to be caught by the juggler at the same level at they were release? (c) What is the velocity of each ball after 1 s?
5. A long jumper leaves the Ground at an angle of 30 degrees to the horizontal and at a speed of 6 m/s (a) How high did he jump? (b) How long did it take before he landed on the ground? (c) how far did he jump?
SELF CHECK ACTIVITY ON LAWS OF MOTION
1. A 3/.5 kg papaya is pushed across a table. If the acceleration of the papaya is 2.2 m/square second to the left, what is the force exerted on the papaya?
2. A constant net force of 200 N is exerted to accelerate cart from rest to a velocity of 40 m/s in 10 s. What is the mass of the cart.
...1. Alice throws the ball to the +X direction with an initialvelocity 10m/s. Time elapsed during the motion is 5s, calculate the height that object is thrown and Vy component of the velocity after it hits the ground.
2. John kicks the ball and ball does projectile motion with an angle of 53º to horizontal. Its initialvelocity is 10 m/s, find the maximum height it can reach, horizontal displacement and total time...
...
Lab #3: InitialVelocity of a Projectile 


Abhishek Samdaria 
Pd.4 and 5 

Lab #3: InitialVelocity of a Projectile
Theory:
How can we determine the initialvelocity of a projectile?
Experimental Design:
The purpose behind this experiment was to determine the initialvelocity of a projectile. Projection motion consists of kinematics of motion in the...
...between the moment the car left the table and the moment it hit the floor?
b. What was the horizontal velocity of the car when it hit the ground?
3. A hawk in level flight above the ground drops the fish it caught. If the hawk’s horizontal speed is , how far ahead of the drop point will the fish land?
4. A pistol is fired horizontally toward a target away, but at the same height. The bullet’s velocity is . How long does it take the bullet to get to the target?...
... Force vector. Equilibrium. Moments.
1. Determine the resultant force and state whether the object is at equilibrium.
sin52=0.788; cos52=0.616; sin25=0.423; cos25=0.906;
sin27=0.454; cos27=0.891; sin26=0.438; cos26=0.899;
2.
If the mass of the plane is 1700kg, and drag force is 50kN, determine what should be the aerodynamic lift force and engine’s thrust so that the plane flew with constant...
...the displacement y of the stone?
 The stone, starting with zero velocity at the top of the building, is accelerated downward by gravity. 

Reasoning The upward direction is chosen as the positive direction. The initialvelocity v0 of the stone is zero, because the stone is dropped from rest. The acceleration due to gravity is negative, since it points downward in the negative direction.
Solution

2). After 3.00 s of freefall,...
...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...
...Chapter 2
Forces
To study the effect of forces acting on particles.
2.1 Equilibrium of a Particle
2.2 Free Body Diagram
2.3 Force Vectors
2.4 Forces in a Plane
2.5 Forces in Space
Expected Outcomes
• Understand the condition for a particle to be in static
equilibrium
• Able to construct free body diagrams
• Able to solve for the forces acting on a static particle
2.1
Equilibrium
of a...
...science
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FORCES
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