Question

A body of mass 3 kg is acted upon by a force which varies as shown in the graph below.The momentum acquired is given by :

• A. Zero
• B. 5 Ns
• C. 30 Ns
• D. 50 Ns

Answer 1

The correct option is D 50 Ns

As we know that,The area under a force-time graph is force multiplied by time, which is a quantity called impulse. Impulse is equal to the change in momentum of an object. So you can figure out how much the momentum changes by finding the area under a force-time graph.

momentum acquired = Area of force-time graph
$=\frac{1}{2}\times \left(2\right)\times \left(10\right)+4\times 10=10+40=50N-S$