quiz

Gravitation

1. Who formulated the Universal Law of Gravitation?

  • A) Johannes Kepler
  • B) Galileo Galilei
  • C) Tycho Brahe
  • D) Isaac Newton
D) Isaac Newton Explanation

2. What is the gravitational constant’s (G) value in Newton’s Universal Law of Gravitation?

  • A) 6.67×10 -11Nm2/kg2
  • B) 9.8 m/s2
  • C) 3×108 m/s
  • D) 1.6×10-19 C
A) 6.67×10 -11Nm2/kg2 Explanation

3. What is the gravitational force of attraction at the center of the Earth?

  • A) Maximum
  • B) Minimum
  • C)  Zero
  • D) Infinite
C) Zero Explanation

4. When a heavier and a lighter object are dropped simultaneously from the same height in a vacuum, what happens to their accelerations?

  • A) The heavier object accelerates faster.
  • B) Both objects accelerate at the same rate.
  • C) The lighter object accelerates faster.
  • D) Both objects accelerate at different rates.
B) Both objects accelerate at the same rate. Explanation

5. What is the value of the standard acceleration of gravity (ɡ0) ?

  • A) 9.0 m/s²
  • B) 10 m/s²
  • C) 9.80665 m/s²
  • D) 9.81 ft/s²
C) 9.80665 m/s² Explanation

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