Question

A constant force of 100 N acts on a body for 8 s for changing its momentum. What is the change of momentum of the body ?

• A. 400
• B. 800
• C. 200
• D. 100

Answer 1

The correct option is B

800

The explanation for the correct answer,

Step 1: Given Data

1. The value of force$\left(F\right)$ acting on the body is$100N$.
2. The force is acted on the body for a time$t=8s$.

Step 2: Calculation of change in momentum

1. We know that force is defined as the rate of change of momentum.
2. So$force=\frac{changeinmomentum}{time}$

Now change in momentum will be equal to$force\left(F\right)\times time\left(t\right)$

$\Rightarrow changeinmomentum=100N\times 8s=800Ns$

Hence, the correct is (B).