1. Physics
Momentum and Impulse

2. Which of the following can best be described as an elastic collision?
(A) A falling tree hitting the earth. (B) A linebacker stopping a fullback. (C) A golf club striking a golf ball. (D) A pie in the face. (E) A cannon shooting a cannon ball.

3. Which of the following can best be described as an explosive event?
(A) A falling tree hitting the earth. (B) A linebacker stopping a fullback. (C) A golf club striking a golf ball. (D) A pie in the face. (E) A cannon shooting a cannon ball.

4. Which of the following can best be described as inelastic collisions?
(A) A falling tree hitting the earth. (B) A linebacker stopping a fullback. (C) A golf club striking a golf ball. (D) A pie in the face. (E) A cannon shooting a cannon ball.

5. What is the magnitude of the impulse as shown in the following figure?
(A)100 Ns (B) 900 Ns (C)1000 Ns (D)1100 Ns

6. HINT: Nothing to calculate.
If the impulse is applied to a particle at rest, what will be its final momentum?
(A)100 kg m/s (B)900 kg m/s (C)1000 kg m/s (D)1100 kg m/s
HINT: Nothing to calculate.

7. What is the impulse shown in the following figure?
(A)225 Ns (B)450 Ns (C)900 Ns (D) 1000 Ns

8. HINT: Use impulse formula.
If this 450Ns impulse is applied to a 200 gm model rocket at rest, what will be its final speed?
(A) 2.25 m/s (B) 22.5 m/s (C) 2250 m/s (D) 4500 m/s
HINT: Use impulse formula.

9. (A) 3.3 m/s (B) 5.0 m/s (C) 6.7 m/s (D) 10 m/s
A kg railroad car travelling at 10 m/s strikes and couples with a 6000 kg caboose at rest. What is the speed of the final combination?
(A) 3.3 m/s (B) 5.0 m/s (C) 6.7 m/s (D) 10 m/s
10 m/s
12000 kg
6000 kg

10. Calculate KE before and after.
A kg railroad car travelling at 10 m/s strikes and couples with a 6000 kg caboose at rest. What is the loss of mechanical energy in the collision?
(A) J (B) J (C) J (D) J
Calculate KE before and after.
10 m/s
12000 kg
6000 kg

11. HINT: Nothing to calculate.
A billiard ball travelling to the right at 6m/s overtakes and strikes an identical ball travelling at 3 m/s (same direction). What is the speed of the 1st ball after the collision?
(A) -6 m/s (B) -3 m/s (C) 3 m/s (D) 6 m/s
HINT: Nothing to calculate.
6 m/s
3 m/s

12. HINT: Nothing to calculate.
A billiard ball travelling to the right at 6m/s overtakes and strikes an identical ball travelling at 3 m/s (same direction). What is the speed of the 2nd ball after the collision?
(A) -6 m/s (B) -3 m/s (C) 3 m/s (D) 6 m/s
HINT: Nothing to calculate.
6 m/s
3 m/s

13. HINT: Nothing to calculate.
A billiard ball travelling to the right at 6m/s strikes an identical ball travelling at 3 m/s (towards it). What is the speed of the 1st ball after the collision, if the 2nd ball were traveling at it, not away from it?
(A) -6 m/s (B) -3 m/s (C) 3 m/s (D) 6 m/s
HINT: Nothing to calculate.
6 m/s
3 m/s