Pick the right answer for each question 1 In order for work to be done, an object must move a The opposite direction of the force being applied b It doesn't have to move c Toward the center of the earth d The same direction as the force being applied 2 What is the formula for work a W F d b w F m c W F m d W F d 3 How much work is required for an 80 kg student to climb a 3 m tall staircase a 2352 J b 1352 J c 3352 J d 4352 J 4 How much work is required for a student who weighs 800 N to climb a 4 m tall staircase 3200 J 200 J 804 J 2400 J 5 Momentum is a vector, which means it has a and a Responses magnitude, direction front, back height, weight beginning, end 6 If you are pushing on a 1,000 kg box that is sitting on the floor for 30 seconds and it moves 0 m, how much work are you doing 1000 J 30,000 J 1,030 J 0 J 7 The momentum of a 0 25 kg baseball thrown at 10 m s is a 2 5 b 0 c 0 25 d 25 8 What is the impulse felt by a person who is hit with 600 N of force over 4 seconds a 150 b 0 c 10000 d 2400 9 What is the change in velocity of a car that goes from 10 m s to 40 m s a 0 m s b 10 m s c 40 m s d 30 m s 10 What is the force felt by a 70 kg man if he is going 10 m s and slams on his brakes and brings his car to a stop The time it takes him to stop is 2 5 seconds a 180 b 380 c 480 d 280 11 A Black ball (8 kg) is traveling to the right at a velocity of 3 m s It hits a White ball (4 kg) traveling to the left at a velocity of 7 m s What is the momentum of the White ball before they hit (remember for these next five problems that right is positive and left is negative) a 24 b 2 67 c 0 d 28 12 What is the momentum of the Black Ball before they hit a 2 67 b 2 c 0 57 d 24 13 What is the total Momentum of the collision a 2 1 b 2 1 c 4 d 4 14 Which way would the White ball be traveling after it hits the Black ball a not moving b they exploded c left d right 15 After they hit, the White ball is moving at 5 m s What is the new velocity of the Black ball a 5 m s b 7m s c 6m s d 3 m s

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Question: Pick the right answer for each question 1. In order for work to be done, an object must move a. The opposite direction of the

Pick the right answer for each question

1. In order for work to be done, an object must move

a. The opposite direction of the force being applied
b. It doesn't have to move
c. Toward the center of the earth
d. The same direction as the force being applied

2. What is the formula for work?

a. W = F*d
b. w = F*m
c. W = F/m
d. W = F/d

3. How much work is required for an 80 kg student to climb a 3 m tall staircase?

a. 2352 J
b. 1352 J
c. 3352 J
d. 4352 J

4. How much work is required for a student who weighs 800 N to climb a 4 m tall staircase?

3200 J
200 J
804 J
2400 J

5. Momentum is a vector, which means it has a ___________ and a ____________.Responses

magnitude, direction
front, back
height, weight
beginning, end

6. If you are pushing on a 1,000 kg box that is sitting on the floor for 30 seconds and it moves 0 m, how much work are you doing?

1000 J
30,000 J
1,030 J
0 J

7. The momentum of a 0.25 kg baseball thrown at 10 m/s is:

a. 2.5
b. 0
c. 0.25
d. 25

8. What is the impulse felt by a person who is hit with 600 N of force over 4 seconds?

a. 150
b. 0
c. 10000
d. 2400

9. What is the change in velocity of a car that goes from 10 m/s to 40 m/s?

a. 0 m/s
b. 10 m/s
c. 40 m/s
d. 30 m/s

10. What is the force felt by a 70 kg man if he is going 10 m/s and slams on his brakes and brings his car to a stop? The time it takes him to stop is 2.5 seconds.

a. 180
b. 380
c. 480
d. 280

11. A Black ball (8 kg) is traveling to the right at a velocity of 3 m/s. It hits a White ball (4 kg) traveling to the left at a velocity of 7 m/s. What is the momentum of the White ball before they hit (remember for these next five problems that right is positive and left is negative).

a. -24
b. -2.67
c. 0
d. -28

12. What is the momentum of the Black Ball before they hit?

a. 2.67
b. 2
c. 0.57
d. 24

13. What is the total Momentum of the collision?

a. -2.1
b. 2.1
c. 4
d. -4

14. Which way would the White ball be traveling after it hits the Black ball?

a. not moving
b. they exploded
c. left
d. right

15. After they hit, the White ball is moving at 5 m/s. What is the new velocity of the Black ball?

a. 5 m/s

b. 7m/s

c. 6m/s

d. -3 m/s

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