Question

An object of mass 2 kg is accelerated uniformly 2 m/s to 4 m/s in 2 seconds. Calculate the magnitude of force acting on it

Answer 1

Answer:

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

Explanation:

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Answer 2

Explanation:

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