Question

an object of mass 100 kg is accelerated uniformly from a velocity of 5 metre per second to 8 m per second in 6 seconds calculate the initial final momentum of the object also find the magnitude of the force exerted on the object

Answer 1

1) To find the momentum

Momentum = mass × velocity.

So, initial momentum = mass × initial velocity.

Mass = 100 kg
initial velocity = 5m/s

So momentum (initial) = 100 × 5

= 500 kg m/s

Final momentum = mass × final velocity.

Mass = 100 kg
Final velocity = 8 m/s

So, final momentum = 100 × 8

= 800 kg m/s


2) To find the force :-

From Newton's second law,

F = ∆p

Where, ∆p = change in momentum.

∆p = (mv - mu)/t

=> ∆p = (final momentum - initial momentum)/time


So F = (800 - 500)/6

=> F = 300/6

=> F = 50 N


Hope it helps dear friend ☺️✌️

Answer 2

$<b><u>HEY MATE ✌$


HERE IS YOUR ANSWER

m = 100 kg

u (initial velocity) = 5 m/s

v (final velocity) = 8 m/s

t = 6 sec

initial momentum = ?

final momentum = ?

F = ?

Momentum = mass × velocity

Initial momentum = mass × initial velocity

= 100 × 5 = 500 kg m/s

Final momentum = mass × final velocity

= 100 × 8 = 800 kg m/s

F = change in momentum/time taken

= final momentum - initial momentum/time taken

= 800 - 500/6

= 300/6

= 100/2

= 50 N


HOPE IT HELPS....