Question

An object of mass 200 kg is accelerated uniformly from a velocity of 5 ms-' to 15 ms-1 in 5 s. Calculate the change in the momentum of the object and also find the force acting on it.
need ​

Answer 1

Given:

An object of mass 200 kg is accelerated uniformly from a velocity of 5 ms-' to 15 ms-1 in 5 s.

To find:

• Change in momentum
• Force acting on it ?

Calculation:

Let momentum change be ∆P

$\rm \: \Delta P = m(\Delta v)$

$\rm \implies\: \Delta P =200 \times (15 - 5)$

$\rm \implies\: \Delta P =200 \times10$

$\rm \implies\: \Delta P =2000 \: kg \: m {s}^{ - 1}$

Now, force experienced:

$\rm \: F = \dfrac{\Delta P}{\Delta t}$

$\rm \implies \: F = \dfrac{2000}{5}$

$\rm \implies \: F = 400 \: N$

Hope It Helps.