Question

A target is made of two plates, one of wood and

the other of iron. The thickness of the wooden

plate is 4 cm and that of iron plate is 2 cm. A

bullet fired goes through the wood first and then

penetrates 1 cm into iron. A similar bullet fired

with the same velocity from opposite direction

goes through iron first and then penetrates 2 cm

into wood. If a1

and a2

be the retardations offered

to the bullet by wood and iron plates respectively,

then

(a) a1

= 2a2​

Answer 1

Answer:

The thickness of the wooden plate is 4 cm and that of the iron plate is 2 cm. A bullet fired goes through iron first and then penetrates 2 cm into wood.

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