Question

A body of mass 3kg is acted on by a force which varies as shown in the graph
below. The momentum acquired is given by
[A] Zero
30 N-s
[B150 N-S
[D]5 N-S​

Answer 1

Answer:

d

Explanation:

Momentum = Area of the graph 1/2 ×2×10+10×4

• =10+4 = 50 N - S

Answer 2

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

[A] zero

[B] 30 N-s

[C] 40 N-s

[D] 50 N-s

Answer:

Option (d) 50 N-s

Explanation:

[Refer to the attached image to visualize the case]

Given;-  

             Mass, m = 3kg

            Force, f = variable.

Then;-

We know that, area under curve of force-time graph gives change in momentum. So;-

         ΔP = Area of triangular part + Area of rectangular part

          ΔP = 1/2 × Base × Height  + B × H

          ΔP = 1/2 × 2 × 10  + 4 × 10

          ΔP = 10 + 40

          ΔP = 50 N-s

Hence, the momentum acquired is given by 50 N-s.

Hope it helps! ;-))