Question

A mass of 2 kg at rest travels for 4 sec with an acceleration of 2.5 ms^-2. The gain in its momentum is (in kg ms^-1)

Answer 1

GIVEN:-

> Mass = 2kg

> Time = 4 Secs

> Acceleration = 2.5ms^-2

TO FIND:-

> Gain in momentum

UNDERSTANDING THE CONCEPT:-

According to the question, We know the mass, time and acceleration. So, by using V = u + at we can find the gain in momentum.

LET'S DO IT!!

• V = u + at
• V= u + 2.5 × 4
• 10ms-1

Gain in momentum = mv

• 2 × 10
• 20kgms-1

Therefore, gain in momentum = 20kgms-1