Download Number Name Honors Section 5-1

Number _________________ Name _____________________________________PHYSICS Honors Section 5-2
questions
1. If your book bag has a total mass of 3.00 kg what would be its mass if it were taken to Jupiter? Jupiter’s
acceleration due to gravity is 10 times that of Earths.
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2. Compare the force needed to lift a 10.0 kg rock on the Earth and on the moon.
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3. Compare the force needed to throw a 10.0 kg rock horizontally at the same speed on earth and on the moon.
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4. You place a carton of books on a handcart. When you accelerate the cart, the carton also accelerates. What
supplies the force that accelerates the carton?
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5. Why does a package on the seat of a bus slide backward when the bus accelerates quickly from rest? Why
does it slide forward when the driver applies the brakes?
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6. Suppose the acceleration of an object is zero. Does this mean there are no forces acting on it? Give an
example supporting your answer.
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7. When a basketball player dribbles a basketball, it falls to the floor and bounces up. Is a force required to make
it bounce? Why?
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8. Drag racers often set their tires on fire to soften the rubber and increase the coefficient of friction. What is the
role friction plays?
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9. Which creates a greater force of friction: sliding your physics book across a table on its back cover or along one
of its edges?
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10. Is the coefficient of friction the same between two identical surfaces in a lab on Earth and in a lab in a space
colony on the moon? Explain
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11. The same object is dropped in a vacuum and then in air. Which of the parameters (distance, velocity,
acceleration) vary and which remain constant during succeeding seconds of time
a. in a vacuum?
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b. in air when terminal velocity from air resistance has been reached?
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12. While riding in a helicopter, you drop two ping-pong balls, one filled with air and the other with water. Both
experience air resistance as they fall.
a. Which ball reaches terminal velocity first? ______________________________________
b. Do both hit the ground at the same time? Explain.
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