A person pushes horizontally on a heavy box and slides it across the level floor at constant velocity. The person pushes with a 60.0 N force for the first 6.88 m, at which time he begins to tire

The force he exerts then starts to decrease linearly from 60.0 N to 0.00 N across the remaining 6.88 m. How much total work did the person do on the box? A) 619 J
B) 826 J
C) 495 J
D) 925 J


A

Physics & Space Science

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What will be an ideal response?

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Which type of spacecraft does NOT need to carry any fuel?

A) nuclear rockets B) ion engines C) solar sails D) chemical rockets

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A 3.0-kg object moving in the positive x direction has a one-dimensional elastic collision with a 5.0-kg object initially at rest. After the collision the 5.0-kg object has a velocity of 6.0 m/s in the positive x direction. What was the initial speed of the 3.0 kg object?

a. 6.0 m/s b. 7.0 m/s c. 4.5 m/s d. 8.0 m/s e. 5.5 m/s

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Boyle’s law can be stated mathematically as PV=constant. This translates to:

A. P and V never change B. P is a linear function of V C. P and V are inversely proportional D. P and V are directly proportional

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