Example 1: What is the force to be applied to a mass of 50 kg to produce an acceleration of 4 ms-2 ?
Solution
Here,
mass of the body, m = 50 kg
acceleration, a = 4 ms-2
force, F= ?
We know, F = ma
=50 kg x 4ms-2
= 200 kg ms-2 = 200 N
Ans: 200 N
Example 2: A boy pushes a box of mass 20 kg with a force of 50 N. What will be the acceleration of the box?
Here,
mass of the box, m = 20 kg
applied force, F= 50 N
acceleration of the box, a = ?
We know
F = ma
a = F/ m = 50N/20kg = 2.5 ms-2
Ans: 2.5 ms-2
