(
mass of the body. A
the same direction.
A bullet of mass 10 g strikes a sand bag with the speed of 10 m/s after covering the
distance of 5 cm
Based on above information, calculate the following
(a) The resistive force exerted by sand on the bullet
(b) The time taken by bullet to come to rest.
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d=5cm=0.05m
m=10g=0.001kg
d=vt
t=d/v=0.05/10=0.005 seconds
F=-ma=-m(v/t)=-0.01(10/0.005)=-20N
Negative sign shows that the force is resistive i.e. In opposite direction
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