Types of Forces I. Gravitational Force and Weight

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4.2Types of Forces I. Gravitational Force and Weight

Types of Forces I. Gravitational Force and Weight Revision Questions

1. A 150 g bird is flying. What are the magnitudes of its Gravitational Force and Weight rounded to 2 decimal places? Take g = 9.81 N/kg.

  1. Fg = 1.47 N, W = 0
  2. Fg = 147.15 N, W = 147.15 N
  3. Fg = 0, W = 1.47 N
  4. Fg = 147.15 N, W = 0

Correct Answer: A

2. It is known that gravity of Moon is much weaker than that of the Earth.

Which of the following statements is WRONG?

  1. Weight of an object at Moon is smaller than weight of the same object on Earth
  2. Mass of an object at Moon is smaller than weight of the same object on Earth
  3. Gravitational force experienced by an object at Moon is smaller than that of the same object on Earth
  4. Gravity experienced by an object at Moon is smaller than that experienced by the same object on Earth

Correct Answer: B

3. What is the weight of the object shown in the figure?

(Take g = 9.81 N/kg; cos 150 = 0.966; sin 150 = 0.259 )

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  1. 10.16 N
  2. 39.24 N
  3. 37.91 N
  4. 588.60 N

Correct Answer: C

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