If you are holding a book and you let go of it, why does it fall? Explain in terms of forces, potential energy, and kinetic ener
1 answer:
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Answer:
Explanation:
Given that
Mass of rifle = M
Initial velocity ,u= 0
Mass of bullet = m
velocity of bullet = v
Lets take final speed of the rifle is V
There is no any external force ,that is why linear momentum of the system will be conserve.
Initial linear momentum = Final linear momentum
M x 0 + m x 0 = M x V + m v
0 = M x V + m v
Negative sign indicates that ,the recoil velocity will be opposite to the direction of bullet velocity.
Answer:
a)
b)
Explanation:
a)
Given:
amount of heat transfer occurred,
initial temperature of car,
final temperature of car,
We know that the change in entropy is given by:
(heat is transferred into the system of car)
b)
amount of heat transfer form the system of house,
initial temperature of house,
final temperature of house,