IPC 2nd Semster Exam Review

The graph shows distance versus time for two toy cars moving in straight lines along a level floor. Which of the following statements concerning the cars is best supported by these data?

• Car 2 has the same weight as Car 1.

• Car 1 has greater speed than Car 2.

• Car 1 has greater momentum than Car 2.

• Car 2 has greater acceleration than Car 1.

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An ant crawled 5.6 centimeters from Point A to Point B in 4.0 seconds. To the nearest tenth, what was the ant’s speed in centimeters per second?

• 0.5 cm/s

• 1.0 cm/s

• 1.5 cm/s

• 1.4 cm/s

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According to the information above, what is the average acceleration of the racer in m/s²?

• 0.46 m/s²

• 0.50 m/s²

• 0.58 m/s²

• 0.62 m/s²

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During which time period is the car moving backward according to the graph shown above?

• 0 s to 10 s

• 20 s to 40 s

• 40 s to 50 s

• 50 s to 60 s

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Which pair of graphs represent the correct relationship between the displacement and velocity of a moving object?

• F

• H

• G

• J

After shooting a cannonball, a cannon recoils with a much lower velocity than the cannonball. This is primarily because, compared to the cannonball, the cannon has a —

• A. much greater mass

• B. smaller amount of momentum

• C. greater kinetic energy

• D. smaller force applied to it

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How many newtons of force does a 50.0 kg deer exert on the ground because of gravity? Record your answer. Be sure to use the correct place value.

• A. 490 N

• B. 50 N

• C. 500 N

• D. 5 N

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A skydiver jumps from a plane 2 km in the air. After 8 seconds, the magnitude of the air resistance on the skydiver is as great as the skydiver's weight. The free-fall continues for 22 seconds more, until the skydiver pulls the ripcord. Which of these statements best describes the fall of the skydiver until the parachute opens?

• A. The acceleration is 9.8 m/sec² the whole time.

• B. The acceleration increases during the first 8 seconds.

• C. The speed is constant after the first 8 seconds.

• D. The air resistance continues to increase after the first 8 seconds.

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Use your knowledge of science to answer the question. The frog leaps from its resting position at the lake's bank onto a lily pad. If the frog has a mass of 0.5 kg and the acceleration of the leap is 3 m/s², what is the force the frog exerts on the lake's bank when leaping?

• 0.2 N

• 0.8 N

• 1.5 N

• 6.0 N

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In the event of an accident, air bags and seat belts may help reduce injury to a passenger by decreasing the force that stops the passenger’s motion. The force is reduced because the seat belts or air bags decrease the —

• mass of the passenger

• acceleration of the passenger

• reaction time of the driver

• speed of the vehicle

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