Question

A bullet of mass 50g moving with velocity of 400 m/s strikes a wall and goes out from the other side with a velocity of 100m/s . Calculate the work done in passing through the wall​

Answer 1

Answer:

The answer will be 3750 Joule

Explanation:

According to the problem the mass of the bullet is 50 g

The velocity of the bullet is 400 m/s

Now we know that work done = force x displacement

Therefore, w = f x s

Now force = mass x acceleration

Therefore we can say that,

w = m x a x s

Now the initial velocity u = 400 m/s before hitting the wall and the final velocity after hitting the wall is v = 100 m/s

Now we know from the 3rd law of equation of motion,

v^2 = u^2 + 2as

as the velocity decreases therefore the equation also changes as

v^2 = u^2 - 2as

now v = 100, u = 400

=> (100)^2 = (400)^2 - 2as

=>  a  x s = 75000

therefore workdone , w = m x a x s = 50/1000 x 75000 = 3750 Joule

Answer 2

Answer:

i donot know do your self

Explanation:

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