Question

An object of mass 100 kg is accelerated uniformly from a velocity of 5 metre per second to metre per second in 6 seconds. Calculate the initial and final momentum of the object. Also, find the magnitude of the force exerted on the object.




please answer VERY VERY urgent ​

Answer 1

Answer:

Initial velocity of the object (u) = 5 m/s

Final velocity of the object (v) = 8 m/s

Mass of the object (m) = 100 kg

Time take by the object to accelerate (t) = 6 s

Initial momentum = mu = 100 × 5

⇒  mu = 500 kg m/s

Final momentum = mv = 100 × 8

⇒ mv = 800 kg m/s

Let us calculate the Force exerted on the object (F)

F = (mv – mu) / t

F = (800 – 500)/6

F = 300 / 6

F = 50 N

Initial momentum of the object is 500 kg m sˆ1.

Final momentum of the object is 800 kg m sˆ1.

Force exerted on the object is 50 N.

Explanation:

Answer 2

Explanation:

Mass of object, m=100kg;

initial velocity, u=5ms −¹

; final velocity, v=8ms −¹

; time, t=6s

Initial momentum =mu=100×5=500Ns

Final momentum =mv=100×8=800Ns

Force exerted on the object,F= mv−mu/t

= 800−500/6

=300/6

=50N