Question

An object of mass 100kg is accelerated uniformly from a velocity of 5m/s to 8m/s in 6s. Calculate the initial and final momentum of the object.
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Answer 1

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=

t

mv−mu

=

6

800−500

=

6

300

=50N

Answer 2

$\huge\bold\red{Hello}$

Given:-

u= 5m/s

v= 8m/s

m= 100kg

t= 6s

mu= 100×5 = 500kg m/s

mv= 100×8 = 800kg m/s

F = mv-mu/t

= m(v-u) /t

= 800-500/6

= 300/6

= 50N