Work,Power,Energy
What is an object's change in momentum equal to?
The impulse that is acting upon the object
A bullet with a mass of 0.010 kg has a kinetic energy of 230 J. What is the velocity of the bullet?
214.42J
A 5000kg truck and a 1000kg car are travelling at constant speeds and then collides. What is true about the Forces and acceleration on each?
The acceleration of each vehicle depends on its mass, with the smaller car experiencing a larger acceleration than the larger truck due to the equal and opposite forces.
A golf club has 10 kg m/s of momentum when it hits a golf ball that is at rest. After the collision, the golf club has a momentum of 1 kg m/s and the golf ball has a momentum of 9 kg m/s. Which of the following comparisons is TRUE about the change in momentum of the two objects?
9kg
A 0.8 kg baseball is dropped from a height of 5 meters above the ground. What is the initial gravitational potential energy of the system consisting of the Earth and the baseball?
9.8
A bird carries a 0.2 kg apple at a height of 20 m above the ground as it flies at a velocity of 5 m/s. What is the total energy of the apple-Earth system?
41.7
A 10kg box is moving across the floor with a constant speed. Which statement explains the mistake of this FBD?
Missing forces, unbalanced forces
A 4 kg pendulum is pushed up from the ground with a velocity of 10 m/s. What maximum height will the pendulum reach?
2.55m
A layer of padding is added to car dashboards because it can reduce some injuries during a collision. How does the padded dashboard make people safer?
The pad reduces the force acting on the person
An object has a mass of 100 kg moving at 5 m/s. What is the linear momentum of the object?
500
A man is whirling a 0.5 kg ball on a 1.0 m long string at 2 m/s. What is true about the force on the ball?
2 Newtons
A 1000 kg car is driving and has a kinetic energy of 6000 J. What is the velocity of the car?
3.46
2.A man climbs on to a wall that is 3.6m high and gains 2268J of potential energy. What is the mass of the man?
64.2
Calculate the momentum of a 0.145 kg baseball being thrown at a speed of 40.0 m/s
5.8
Jane drives to work, she puts her purse on the passenger seat. By the time she arrives at work her purse is on the floor, how would you explain why her purse is on the floor to her?
inerta
A bus is moving at a speed of 20 m/s, when it begins to slow at a constant rate of 5 m/s2 in order to stop at a bus stop. If it comes to rest at the bus stop, how far away was the bus from the stop?
40m
A ball is dropped from 4 meters above the ground. If it begins at rest, how long does it take to hit the ground?
.903s
A 3 kg ball is rolling 2 m/s. How much kinetic energy does it have?
6j
A bicycle has a momentum of 25.00 kg·m/s and a velocity of 2.5 m/s. What is the bicycle’s mass
10
Your shopping cart has a mass of 65 kilograms. In order to accelerate the shopping cart down an aisle at 0.3 m/s , what force would you need to use or apply to the cart?
19.5 N
A pilot stops a plane in 484 m using a constant acceleration of -8.0 m/s2 . How fast was the plane moving before braking began?
88m/s2
A ball is thrown upward at 4 meters per second starting from ground level. How long does it take for the ball to return to the ground?
.815