Question

A body of mass 10 kg is kept on a rough horizontal surface. If the force applied on the body is increased by 80 N, then the acceleration of the body increases by:

• A. \( 16 \, \text{ms}^{-2} \)
• B. \( 12 \, \text{ms}^{-2} \)
• C. \( 8 \, \text{ms}^{-2} \)
• D. \( 10 \, \text{ms}^{-2} \)

Hint:

Force is directly proportional to acceleration, and the relationship is given by \( F = ma \).

Answer 1

The Correct Option is C

- The acceleration of the body is given by Newton's second law, \( F = ma \), where \( F \) is the net force and \( m \) is the mass of the body.
- Initially, the body has some force applied to it, and when the force increases by 80 N, the acceleration increases accordingly. Using the formula: \[ a = \frac{F}{m} = \frac{80}{10} = 8 \, \text{ms}^{-2} \]