Question

A man of mass m = 60 kg is standing on weighing machine fixed on a triangular wedge of angle $\theta ={60}^{\circ }$ with horizontal as shown in the figure. The wedge is moving up with an upward acceleration a = 2 $m/s^2$. The weight registered by machine is

• A. 600 N
• B. 1440N
• C. 360 N
• D. 240 N

Answer 1

The correct option is C 360 N


$N-mgcos\theta =macos\theta$
$N=m(g+a)cos\theta =60(10+2)cos{60}^{\circ }$
$=360N$