Question

force of 20 N acts on a body of mass 40 Kg. Find the acceleration produced in the body. How far the body will move in 2 seconds?​

Answer 1

Given: A force of 20 N acts on a body of mass 40 kg.

To find: The acceleration produced in the body and the speed of the body in 2 seconds.

Solution:

• Force is the external cause that changes or tends to change the state of motion or of rest of a body.
• It is given by the formula,

       $F = m * a$

• Here, F is the force applied, m is the mass and a is the acceleration of the body.
• On replacing the terms with the values given in the question,

        $20N = 40 kg * a$

• On rearranging and solving further, the value of a is found to be,

        $a = 0.5ms^{-2}$

• The speed of the body is calculated by the formula,

        $a = \frac{s}{t}$

• Here, s is the speed of the body and t is the time taken.

        $0.5 = \frac{s}{2s}$

        $s = 1ms^{-1}$

Therefore, the acceleration produced in the body is 0.5 ms⁻² and the speed of the body in 2 seconds is 1 ms⁻¹.