Question

A block of mass 2 kg placed on a long frictionless horizontal table is pulled horizontally by a constant force F. It is found to move 10 m in the first two seconds. Find the magnitude of F.

Answer 1

Given, m = 2kg, S = 10 m

Let acceleration = a

and Initial velocity, u = 0

We know, S =$ut+\frac{1}{2}a{t}^2$

$\Rightarrow 10=\frac{1}{2}a\left(2^2\right)$

$\Rightarrow 10=2a$

$\Rightarrow a=5m/s^2$

$\therefore$ Force, F= ma = $2\times 5$ 10 N