Question

Example 5.2 A bullet of mass 0.04 kg
moving with a speed of 90 m s- enters a
heavy wooden block and is stopped after a
distance of 60 cm. What is the average
resistive force exerted by the block on the
bullet?​

Answer 1

Explanation:

11th

Physics

Motion in a Straight Line

Problems on Equation of Motion

A bullet of mass 0.04 kg mo...

PHYSICS

A bullet of mass 0.04 kg moving with a speed of 90m/s enters a heavy wooden block and is stopped after a distance of 60 cm . What is the average force exerted by the block on the bullet?

MEDIUM

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ANSWER

Given,

m=0.04kg

u=90m/s

v=0m/s

S=60cm

From 3rd equation of motion,

2aS=v

2

−u

2

a=−

2S

u

2

a=−

2×60×10

−2

90×90

=−6750m/s

2

The resistive force, f=ma

f=−0.04×67.5

f=−270N