Physics Quiz on Gravity and Forces -Abbas

What is the value of gravitational acceleration (g) on Earth?

• 10 m/s²

• 9.8 m/s²

• 8.9 m/s²

• 9.81 km/h

What is the average radius of Earth?

• 6.4 × 10⁵ km

• 6.4 × 10⁶ cm

• 6.4 × 10⁶ m

• 6.4 × 10³ m

What is the mass of Earth?

• 5.972 × 10²² kg

• 5.972 × 10³⁰ kg

• 5.972 × 10²⁴ kg

• 6.674 × 10⁻¹¹ kg

SI unit of gravitational constant G is:

• Nm/kg

• Nm²/kg²

• m/s²

• J/kg

What is the value of gravitational constant G?

• 9.8 m/s²

• 10⁶ Nm²/kg²

• 6.673 × 10⁻¹¹ Nm²/kg²

• 1.6 × 10⁻¹⁹ Nm²/kg²

What is the formula for gravitational force?

• F = ma

• F = mv²/r

• F = Gm₁m₂/r²

• F = kq₁q₂/r²

The gravitational force between two masses becomes one-fourth if the distance is:

• Doubled

• Halved

• Tripled

• Reduced to one-fourth

The force of gravity is always:

• Repulsive

• Attractive

• Perpendicular

• Negative

Which quantity is a vector?

• Mass

• Energy

• Gravitational force

• Temperature

The weight of an object on Earth is:

• Independent of mass

• Same as on moon

• Equal to mass × g

• Equal to its volume