Logo

Get Updates

Subscribe to receive instant notifications for new study materials and important updates.

Home» class 9»Science» Chapter 9: Gravitation

Gravitational force acts on all objects in proportion to their... - Science

Question

Gravitational force acts on all objects in proportion to their masses. Why then, a heavy object does not fall faster than a light object?

Answer

This happens because acceleration due to gravity is independent of the mass of the object.

Reason:

  1. While the gravitational force is proportional to mass (F = mg), the acceleration is the ratio of Force to Mass (a = F/m).

  2. The formula for acceleration due to gravity is:

    g = \frac{GM}{R^2}
    (Where M is the mass of the Earth and R is the radius).
  3. Since the mass of the object (m) does not appear in this formula, all objects (whether heavy or light) fall with the same acceleration.