Question

A force 1.ON acts on body of mass 10 kg. As a result the body cove
us on body of mass 10 kg. As a result the body covers 100 cm in 4 seconds moving along
a straight line. It's initial velocity is

a) 0.5 cms - 1
b) 5 cms - 1
c) 50 cms - 1
5 cms - 1​

Answer 1

given, mass = 10 kg

force = 1.0 N

f = ma

1 = 10a

a = 0.1 m/s²

s = ut + at²/2

1 = 4u + 0.1x4²/2

1 = 4u + 0.8

4u = 0.2

u = 0.05 m/s

or u = 5 cm/s

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