Question

Fig. shows the velocity-time graph of a particle of mass $100g$ moving in a straight line. Calculate the force acting on the particle.

• A. $0.4$ $N$
• B. $0.5$ $N$
• C. $4$ $N$
• D. $2$ $N$

Answer 1

The correct option is A $0.4$ $N$

$Force=mass\times acc$

$a=\frac{dv}{dt}=\frac{v_2-v_1}{t_2-t_1}=\frac{20-0}{5-0}4m/s^2$

$\therefore Force=100\times {10}^{-3}\times 4$

$=0.4N$