Physics RP2 Quiz 1 Vocab: Intro to Energy & Motion

Newton's 3rd Law: When a student on a skateboarder applies a force of 20 Newton to 'push' the ball in a positive direction, what does the student experience?

• A positive (+) force of the same magnitude

• A negative (-) force of equal magnitude

• No force at all, only the ball experiences the force

• A force that is smaller than the 'push' do to being more massive

Newton's 3rd Law: When a student (40 kg) on a skateboard applies a force to accelerate a medicine ball (5kg) to the right, the force acting on the student is:

• A much smaller force

• A much larger force

• Exactly the same force applied to the ball

• No answer is correct

The momentum of an object depends upon the object's ___________&_____________.

• size and shape

• mass and veloctiy

• mass and energy

You have THREE different objects with different masses traveling at different velocities. Which has the greatest momentum?

Object A: really massive traveling slowly

Object B: low mass traveling really fast

Object C: a medium mass traveling at a medium speed

• Object A has the greatest momentum

• Object B has the greatest momentum

• Object C has the greatest momentum

• We cannot say which one has the most momentum without knowing the mass and velocity

Two billiard balls collide. Identify the type of collision.

• elastic

• perfectly elastic

• inelastic

• perfectly inelastic

In a two-body collision,

• momentum is always conserved

• kinetic energy is always conserved

• neither momentum nor kinetic energy is conserved

• both momentum and kinetic energy are always conserved

This picture is an example of ____________

• Elastic Collision
• Inelastic collision

The law of conservation of momentum states that

• the total initial momentum of all objects interacting with one another usually equals the total final momentum

• the total initial momentum of all objects interacting with one another does not equal the total final momentum

• the total momentum of all objects interacting with one another is zero

• the total momentum of all objects interacting with one another remains constant regardless of the nature of the forces between the objects

The law of conservation of momentum states that the total momentum of all objects interacting with each other will ________________________ no matter of the nature of the forces between the object.

• increase

• decrease

• remain constant

• fluctuate

A rock freefalls off of a cliff toward Earth. The momentum of the falling rock is _______ on its fall.

• Decreasing

• Increasing

• Staying constant

• No idea whatsoever