1. Basic momentum and impulse questions
   
2. Conservation of momentum questions (linear and at an angle)
   
3. Elastic and inelastic collisions
   
4. Elastic collisions where objects separate and (1) mass #2 initially at rest and (2) mass #2 initially moving
   
5. Hook's Law and Elastic Potential Energy
   
6. Gravitational potential energy (review from grade 11)
   
7. Conservation of energy:*   conversions between kinetic, gravitational potential, and elastic potential energy.
   
   
   
8. A basic Simple Harmonic Motion question
   
   

1. Match the terms with the definitions, below:

_____kinetic energy

_____elastic potential energy

_____gravitational potential energy

_____impulse

_____momentum

_____inelastic

_____elastic

_____Hooke's law spring

_____conservation of energy

_____force

_____work

_____thermal energy

A. The rate of change of momentum

B. The energy stored due to the vertical position of an object

C. A collision in which both momentum and kinetic energy are conserved is ________.

D. Transfer of mechanical energy when force is applied over some distance.

E. A collision in which momentum is conserved but kinetic energy is not.

F. The form of energy that accumulates when an elastic object is bent, stretched or compressed.

G. Product of an object's mass times velocity.

2. A 48.0 kg skateboarder kicks his 7.0 kg board ahead with a velocity of 2.6 m/s [E]. If he runs with a velocity of 3.2 m/s [E] and jumps onto the skateboard, what is the velocity of the skateboard and skateboarder immediately after he jumps on the board?
ANSWER:     v' = 3.12 m/s [E]

3. A 750 g red ball traveling 0.30 m/s[E] approaches a 550 g blue ball traveling at 0.50 m/s[W]. They suffer a glancing collision. The red ball moves away at 0.15 m/s[E 30 S]. What is the velocity of the blue ball after the collision?
ANSWER:     v' =

4. A 35 kg child is jumping on a pogo stick. If the spring has a spring constant of 4945 N/m and it is compressed 25 cm, how high will the child bounce? (Assume the mass of the pogo stick is negligible)
ANSWER:     h = 0.45 m

5. A block of wood with a mass of 0.500 kg slides across the floor towards a 3.50 kg block of wood. Just before the collision, the small block is traveling at 3.15 m/s. Because some nails are sticking out of the blocks, the blocks stick together when they collide. Scratch marks on the floor show that they slid 2.63 cm before coming to a stop. What is the coefficient of friction between the wooden blocks and the floor?
ANSWER:     coefficient of friction = 0.32

6. In an amusement park there is a ride on which children site in a simulated log while it slides rapidly down a water-covered slope. At the bottom, the log slams into a trough of water, which slows it down. Why did the ride designers not simply have the log slam into a large perfectly elastic spring?
ANSWER:     The log boat would keep bouncing back up the slope forever, if spring were ideal

7.   A 4.0 kg ball moving to the right at 5.0 m/s collides head-on with a 2.0 kg ball moving to the left at 4.0 m/s. If the collision is elastic, determine the direction and speed of each ball after the collision.
ANSWER:    
v'(1) = -1.0 m/s (or 1.0 m/s[left])
v'(2) = 8.0 m/s [right])

8. A 200 kg car is parked atop a roller coaster which is 20 m tall. It is resting against an ideal spring which is compressed 0.50 m from its resting position. The spring constant is 5000 N/m

The spring is released and the car begins to move along and down the track.

(A) Find the velocity of the car at point C on the track, which is at an elevation of 5 m off the ground.
ANSWER:     v' = 17.3 m/s [fwd]

(B) If a braking force of 10,000 N is applied to oppose the forward motion of the car at point C, what is the distance the car would travel before coming to a complete stop?
ANSWER:     d = 3.0 m