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AP Physics 1: Momentum

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Section 1

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If the momentum of an object is doubled, by what factor will its kinetic energy change?

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Date created

Mar 1, 2020

Cards (21)

Section 1

(21 cards)

If the momentum of an object is doubled, by what factor will its kinetic energy change?

Front

4

Back

If a quantity you calculated had units of kg*m/s what type of quantity could it be?

Front

momentum, impulse

Back

A rubber ball with speed of 5 m/s collides head on elastically with an identical ball at rest. What is the speed of the initially stopped ball after the collision?

Front

5 m/s

Back

You are standing on a skateboard, initially at rest. A friend throws a very heavy ball towards you. You have two choices about what to do with the ball: either catch the ball or deflect it back toward your friends with the same speed as it was originally thrown. Which choice should you make in order to maximize your speed on the skateboard?

Front

deflect the ball back

Back

A very large object moving with speed v collides head on with a very small object at rest. The collision is elastic, and there is no friction. The large object barely slows down. What is the speed of the small object after the collision?

Front

nearly 2v

Back

Two objects of different masses have momentum of equal, non zero magnitude. Which object has more kinetic energy

Front

the lighter object

Back

A very light ping pong moving east at a speed of 4 m/s collides with a very heavy stationary bowling ball. The ping pong ball bounces back to the west, and the bowling ball moves very slowly to the east. Which object experiences the greater magnitude impulse during the collision ?

Front

Neither. both experienced the same magnitude impulse

Back

consider two unequal masses M and m. Which of the following statements is FALSE?

Front

If a uniform rod of mass m were to join the two masses, it would not change the location of the center of mass of the two objects

Back

A 100 kg football linebacker moving at 2 m/s tackles head on an 80 kg halfback running 3 m/s. Neglecting the effects due to digging in of cleats.

Front

The halfback will drive the linebacker backward

Back

In a collision between two unequal masses, which mass receives a greater magnitude impulse?

Front

they receive equal impulses

Back

During World War 1, Germany used a "Big Bertha" cannon to hurl shells into Paris 30 miles away. This gun also had a very long barrel. What was the reason for using a long barrel in these guns?

Front

to allow the force of expanding gases from the gunpowder to act for a longer time

Back

A very small object moving with velocity v collides head on with a very large object with velocity -v, in a frictionless environment. The collision is almost perfectly elastic. The speed of the large object after the collision is

Front

slightly less than v

Back

The momentum of an isolated system conserved

Front

in both elastic and inelastic collisions

Back

A small cat meshes with a large truck in a head on collision. Which of he following statements concerning the magnitude of the average force during he collision is correct?

Front

the small car and the truth experience the same average force

Back

There must be equal amounts of mass on both sides of the center of mass of a systems.

Front

False

Back

A tiger is running in a straight line. If we double both the mass and speed of the tiger, the magnitude of its momentum will increase by what factor????

Front

4

Back

Two friends are standing on opposite ends of a canoe that is initially at rest with respect to a frictionless lake. The person in the front throws a very massive ball toward the back, and the person in the back catches it. After the ball is caught the canoe is

Front

stationary

Back

Identical forces act for the same length of time on two different objects. The magnitude of th change in momentum of the lighter object is

Front

exactly equal to the magnitude of the change in momentum of the larger mass.

Back

A firecracker explodes in midair and breaks up into many fragments. Which of the following statements are true regarding conditions immediately before and immediately after the explosion: 1: the total momentum of the fragments is equal to the original momentum of the firecracker 2: the total KE of the fragments is equal to the original ke of the firecracker

Front

statement 1 only

Back

A small car meshes with large truck in a head on collision. Which of the following statements concerning the momentum during the collision are correct?

Front

The momentum of the car truck system is conserved, but the momentum of each one separately is not conserved

Back

A constant 6 N force acts for 4 s on a 12 kg object. What is the objects change of velocity

Front

2 m/s

Back