Kinematic Equations
Vf^2 = Vi^2 + 2ad
what is the shortcut equation?
A push or a pull acting on an object as a result of an interaction with another object.
What is a force?
The amount of “motion“ something has and it’s tendency to continue moving.
What is Momentum?
A 1kg ball moving at 1 m/s hits a 0.4 kg at rest. If the 1 kg ball stops after the collision, what is the velocity of the 0.4 kg ball after the collision?
2.5 m/s
A ball that starts from rest roles down a hill for 5 seconds and reaches a final speed of 10m/s. What is the balls acceleration?
2 m/s^2
An object at rest will remain at rest. An object in motion will remain in motion at a constant velocity unless acted by an unbalanced force.
What is Newton’s 1st law?
A 4.99 kg bowling ball rolls at a speed of 2m/s. What is it’s momentum?
9.98 kgm/s
A 3 kg magnet moving at 2.4 m/s collides and sticks with a 2.1 kg magnet moving at -10 m/s. What is there final velocity?
-2.71 m/s
A jet starts from rest and accelerates 4m/s^2. How long will it take the jet to reach 200m?
10 seconds
A force of 2 N is applied to a .002 kg marble. It rolls on a level floor opposed by a force of kinetic friction of .002 N. What is the acceleration of the marble?
499 m/s^2
The change in momentum.
What is impulse?
A spring connects a 2 kg toy car and a 3.75 kg toy car. When the spring is released the 2 kg toy car moves at 7.5 m/s. What will the velocity of the 3.75 kg toy car be?
-4 m/s
A car starts with a speed of 55m/s and has an acceleration of 10m/s^2. Determine the cars speed after 15 seconds.
205m/s
A golf club hits a golf ball with a force of 25 N east. If the mass of the golf club is 10,000 times the mass of the golf ball, what is the force of the golf ball on the golf club? Why?
25 N west
A force on an object always comes from another object, which experiences an equal and opposite force from the first object.
A 1325 kg car accelerates from 10 m/s to 20 m/s in 4 seconds. What is the average force exerted on the car during the acceleration?
3,312.5 N
A man weighing 60 N gets pushed off a diving board 5.5 meters above the water. What is his kinetic energy immediately before touching the water?
330 J
A handball is thrown horizontally from a height of 2 meters and with a speed of 11m/s towards a player 7 meters away. Will the player catch the ball?
Yes
A 5 kg box slides on a shelf with a kinetic friction of 14.715 N. What is it’s coefficient of friction? What is the box an shelf made of?
0.30
They are both made of wood
A 40 kg player runs at 1.2 m/s. What is his momentum?
60 kgm/s
A 2 kg phone falls off a 1 meter desk. What is the phone’s kinetic energy when it falls halfway down?
9.81 meters