Book Online Demo

Check Your IQ

Try Test

Courses

Offline Centres

An object of mass $50 kg$ is accelerated uniformly from a velocity of $4 m / s$ to $8 m / s$ in $8 s .$ Then, find the magnitude of the force exerted on the object?

see full answer

21% of IItians & 23% of AIIMS delhi doctors are from Sri Chaitanya institute !!

An Intiative by Sri Chaitanya

20 N

25 N

21 N

22 N

answer is B.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

An object of mass

50 kg

is accelerated uniformly from a velocity of

4 m / s

8 m / s

8 s

then the magnitude of force exerted on the object is

25 N

.
Givem,
Mass,

= 50 kg

;
Velocities,

u = 4 m / s

and

v = 8 m / s

Time,

t = 8 s

Initial momentum,

p_{1} = mu

= 50 \times 4

= 200 kg / s

Final momentum

p_{2} = mv

= 50 \times 8

= 400 kg / s

Force

= \frac{Momentum change}{Time}

= \frac{p_{2} - p_{1}}{t}

= \frac{400 - 200}{8}

= \frac{200}{8}

= 25 N

Watch 3-min video & get full concept clarity