Question

Figure shows a man of mass $55\, kg$ standing stationary with respect to a horizontal conveyor belt that is accelerating with $1\,m$ $s^{-2}$. The net force acting on the man is

• A. $35\, N$
• B. $45\, N$
• C. $55\, N$
• D. $65\, N$

Answer 1

Answer: (C)

$55\, N$

Answer 2

Here, mass of the man, $M=55 \,kg$ As the man is standing stationary w.r.t. the belt, acceleration of man = acceleration of belt. $\therefore\quad$ Acceleration of man, $a=1\, m$ $s^{-2}$ $\therefore\quad$ Net force on the man $F=Ma$ $=\left(55 \,kg\right)$ $\left(1 \,m\,s^{-2}\right)$ $=55 \,N$