2. What is the displacement of an object with a v vs. t graph of:
15 cm
-15 m
0.83 m
-0.83 m
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3. What best describes the motion of the object during the time interval of 4.0 s – 6.0 s?
Constant forward velocity
Constant negative velocity
No motion
Constant acceleration
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4. Which of the following is an example of projectile motion?
Wonder Woman flying through the air.
A volleyball pounded over the net.
A paper airplane gliding through the air.
An airplane traveling from LA to Dallas.
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5. Both hit at the same time.
A rubber suction cup is fired horizontally from a toy gun, and another rubber suction cup is dropped simultaneously from the same height. Neglecting air resistance, which bullet hits the ground first?
The fired one.
The dropped one.
Both hit at the same time.
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6. A battleship simultaneously fires two shells at enemy ships
A battleship simultaneously fires two shells at enemy ships. If the shells follow the trajectories shown, which ship gets hit first?
A will be hit first.
B will be hit first.
Both will be hit at the same time.
It depends on the actual angles.
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7. The one thrown downwards. The final velocities are the same.
One penny is thrown upwards at a velocity , V, from the top of a building and another penny is thrown downwards from the top of the same building at a velocity of –V. Which hits the ground with the largest final velocity?
The one thrown upwards.
The one thrown downwards.
The final velocities are the same.
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8. Velocity remains constant.
Assuming air resistance is negligible, what happens to the horizontal velocity of a projectile after it is released and is traveling up?
Velocity decreases.
Velocity increases.
Velocity remains constant.
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9. Velocity remains constant.
Assuming air resistance is negligible, what happens to the vertical velocity of a projectile after it is released and is going up?
Velocity decreases.
Velocity increases.
Velocity remains constant.
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10. A ball the thrown straight upward
A ball the thrown straight upward. What is its acceleration at the very top of its path?
Zero
Approximately 10 m/s2
More than zero but less than about 10 m/s2
More than 10 m/s2
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11. The car. The truck. Neither, it is the same
A small sports car collides head on with a massive truck. Which vehicle will experience the greatest magnitude force?
The car.
The truck.
Neither, it is the same
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12. The car. The truck. Neither, it is the same.
A small sports car collides head on with a massive truck. Which will undergo the greater magnitude acceleration?
The car.
The truck.
Neither, it is the same.
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13. Less than 25 N (but more than 0 N) Exactly 25 N 0 N
Throwing a ball 6 m straight upwards requires a 25 N throwing force. How strong is the throwing force it experiences when the ball is half way to the top?
More than 25 N
Less than 25 N (but more than 0 N)
Exactly 25 N
0 N
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14. Acceleration increases. Acceleration decreases.
A truck loaded with sand accelerates along a highway. If the driving force stays the same on the truck, what happens to the truck’s acceleration if its trailer leaks sand at a constant rate through a hole in the bottom?
Acceleration increases.
Acceleration decreases.
Acceleration stays the same.
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15. Newton’s 1st law explains this. Newton’s 2nd law explains this.
An army plane wants to drop supplies to a group of physics students stranded on an island. In order for the package to land on the island, the pilot needs to drop the package before the plane is directly above the island. Explain why using Newton’s Laws (you may ignore air resistance).
Newton’s 1st law explains this.
Newton’s 2nd law explains this.
Newton’s 3rd law explains this.
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16. 49 m/s2 98 m/s2 30 m/s2 Need more information.
A fighter pilot can withstand an acceleration of up to 10-g’s. What acceleration can they withstand in m/s2?
49 m/s2
98 m/s2
30 m/s2
Need more information.
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17. A cannonball is shot into deep space (far from any planets) how much force is needed to keep it moving at 3.0 m/s?
3.0 N
More than 3.0 N
Less than 3.0 N
0 N
Need more information.
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18. A golf ball at rest is hit and leaves the club at 40. m/s
A golf ball at rest is hit and leaves the club at 40. m/s. If the mass of the golf ball is 2.0 kg and the time of contact with the club is 0.50 sec, what force was the ball hit with?
180 N
160 N
140 N
80. N
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19. A skier on top of a friction-filled hill has 40 J of PE
A skier on top of a friction-filled hill has 40 J of PE. What is the skier’s KE at the bottom of the hill?
40 J
More than 40 J
Less than 40 J
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20. “x” in the PEs equation (1/2kx2) is
The distance the spring is compressed.
The distance the spring is stretched.
The distance the spring is stretched or compressed.
The total length of the spring.
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21. Larger than it originally was. Smaller than it originally was.
A boy is coasting along a frictionless pond when he scoops up a 12-pack of soda. With the soda in his arms, his velocity is now
Larger than it originally was.
Smaller than it originally was.
The same as it originally was.
Need more information.
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