A truck starts from rest and rolls down a hill with a
constant acceleration. It travels a distance of 400
m in 20 s. Find its acceleration. Find the force
acting on it, if its mass is 7 tonne.
(Hint: 1 tonne = 1000 kg)
Solv that....
Answers
Answered by
2
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
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