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1. Two roller skaters stand facing each other. One of their masses is 80 kg, the other is 72 kg. If they both push each other at the same time, what happens to their momentum?

A. The lighter skater has a higher momentum.

B. The heavier skater has a higher momentum.

C. Their momenta are equal but opposite.

D. The lighter skater has a higher velocity

2. A passenger on a bus traveling west sees a man standing on a curb. From the passengers perspective the man appears to be…

A. Standing still.

B. Moving to the East at a speed greater than the bus.

C. Moving East at a speed equal to the bus.

D. Moving west at a speed equal to the bus.

3. A snowmobile with a mass of 500 kg is moving 40 m/s in the Alaskan wilderness. Suddenly a Caribou galloped into the track of the snowmobile. Fearing for his life the driver applied the brakes to the snowmobile with a force of 235 N. How long does it take the sled to come to a complete stop?

A. 120 seconds B. 85 seconds C. 76 seconds D. 8.5 seconds

4. What is the tangential speed of a boy on a Ferris wheel a distance of 10 meters from the center when he moves 3 radians in 15 seconds?

A. 0.5 m/s

B. 1 m/s

C. 2 m/s

D. 4.5 m/s

E. 450 m/s

5. A 50.0 N crate starts at rest and slides down a 10.0 m long ramp inclined at 40.0° to the horizontal. The force of friction between the crate and the ramp is 9.0 N. What is the net force (in N)?

A. 23 N B. 46 N C. 29 N D. 41 N

6. A wakeboarder with a mass of 60 kg is accelerated across a smooth lake at 1.5 m/s2. What net force acts on the wakeboarder horizontally?

A. 3 N B. 90 N C. 75 N D. 0.03 N

7. A free body diagram of a ball falling in the presence of air resistance would show

A. Only a downward arrow to represent the force of air resistance.

B. Only a downward arrow to represent the force of gravity.

C. A downward arrow to represent the force of gravity and an upward arrow to represent the force of air resistance.

D. An upward arrow to represent the force of gravity and a downward arrow to represent air resistance.

8. The length of a force vector represents the

A. Cause of force

B. Direction of force

C. Magnitude of force

D. Type of force

9. A boat having a mass of 30 kg is accelerated across a level road at 2.0 m/s2. What net force acts on the boat horizontally?

A. 15 N B. 10 N C. 60 N D. 32 N

10. A hiker travels south along a straight path for 1.5 hours with an average velocity of .75 km/h, and then travels south for 2.5 hours with an average velocity of .90 km/h. What is the hiker’s displacement for the total trip?

A. 2.5 km to the south

B. 2.2 km to the south

C. 3.4 km to the south

D. 4.0 km to the south

11. A rock is thrown up from the top of a cliff with an initial speed of 2.0 m/s. If it hits the ground after 2.0 seconds, what is the height of the cliff? (disregard air resistance)

A. 6 m B. 15.6 m C. 22.6 m D. 34 m

12. A car starts traveling 10 km from EHS, 2 minutes later it is 16 km from the school and 5 minutes later it is 25 km away. What is the car’s displacement in the first 2 minutes?

A.16 km B. 6 km C. 25 km D. 15 km

13. An athlete runs 110 m across a level field at an angle of 30 degrees north of east.

What are the east and north components of her displacement, respectively?

A. 55 m, 95 m B. 190 m, 64 m C. 64 m, 190 m D. 95 m, 55 m

14. A car travels 15 km during the first half hour, and then travels 45 km in the second half hour of the trip. The average velocity for the trip is (in km/hr)…….

A. 60 km/hr B. 70 km/hr C. 30 km/hr D. 50 km/hr

15. Which item does not represent circular motion?

The earth’s orbit around the sun.
B, The Ferris Wheel as it moves with riders.

C. A bicycle tire going down hill.

D. A car sliding down a hill after being rolled.

E. A battleship circling.

16. If two teams are playing tug-of-war, a rope is pulled by a force of 80 N to the left and by a

force of 70 N to the right. What is the magnitude and direction of the net horizontal force on the rope?

A. 10 N to the right

B. 150 N to the right

C. 10 N to the left

D. 150 N to the left

17. Centripetal Acceleration. A girl sits on a tire that is attach to a tree and her father pushes her with a tangential speed of 4.8 m/s, and she travels in a horizontal circle 8m. What is the centripetal acceleration of the girl?

A. 5.76 m/s2

B. 92.16 m/s2

C. 38.4 m/s2

D. 19.2 m/s2

18. A Rufous Hummingbird flies with a constant velocity of 10 m/s. What is its acceleration?

A. 20 m/s2

B. 10 m/s2

for someone who supposedly knows so much about fighting and the military you cant figure out some basic math problems

many of your questions are incomplete and cannt be answered

1 e
2 e
3 e
4 f
5 g

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