(b)A ball of mass 100 g moving with velocity 10 m/s is stopped by a boy in 0.2 s.Calculate the force applied by the boy to stop the ball
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HOLA!!!
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GIVEN
Mass (m) = 100g
Initial velocity (u) = 10m/s
Final velocity (v) = 0 (since it stops)
time (t) = 0.2s
SOLUTION
Force = m (v-u)/t
= 100 (0-10)/0.2
= -1000/0.2
= -10000/2
= - 5000N ( "-" indicates the force in opposite direction)
The force applied by the by the boy to stop it is 5000N
____________
GIVEN
Mass (m) = 100g
Initial velocity (u) = 10m/s
Final velocity (v) = 0 (since it stops)
time (t) = 0.2s
SOLUTION
Force = m (v-u)/t
= 100 (0-10)/0.2
= -1000/0.2
= -10000/2
= - 5000N ( "-" indicates the force in opposite direction)
The force applied by the by the boy to stop it is 5000N
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