Question

# We usually assume that your weight as measured by a scale is equal to the magnitude...

We usually assume that your weight as measured by a scale is equal to the magnitude of the gravitational force that the earth exerts on you. Because of the rotation of the earth, however, the scale reading can actually be slightly different from your true weight. Which of the following accurately describes this effect?

A The scale reading is always greater than your true weight.

B The scale reading is always less than your true weight.

C The scale reading is only equal to your true weight if you are at the equator.

D The scale reading is only equal to your true weight if you are at the north or south pole.

A forklift is used to lift a crate from the floor to a height of 1.5 m, carry it 50 m across a warehouse, and lower it back to the floor. If the crate weighs 2500 N, how much work was done on the crate by the forklift during this move?

A No work.

B 1900 J

C 3800 J

D 7500 J

E None of these is correct.

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