Question

A block of mass $10\text{kg}$ moves up from bottom to top of a smooth wedge which is moving with an acceleration $a_0=3{\text{m/s}}^2$. Find the work done by the pseudo force measured by the person sitting at the edge of the wedge.

• A. $120J$
• B. $150J$
• C. $90J$
• D. Zero

Answer 1

The correct option is C $90J$



$W_{\text{pseudo force}}=m{a}_0\times 5\times \cos {53}^{\circ }$
$=10\left(3\right)\times 5\times \frac{3}{5}$
$=90J$