Question

of the car!
10. A bulle
11. A bulla
1.2. A bulle
nu 20 m/s to 40 m/s. How much work was done by the engine
bullet of 50 g strikes a target with a velocity of 600 m/s. Its velocity reduces to 15
se target. How much energy of bullet was used to peneterate the target
na velocity of 600 m/s. Its velocity reduces to 150 m/s after penetrating
bullet of 10 8 penetrates a target with a velocity of 100 m/s. Its velocity reduce
00 m/s Its velocity reduces to 60 m/s after
bullet of 0.10 kg is moving with a velocity of 400 m/s. How much work will
late the loss in energy of the bullet in penetrating the target.
locity of 400 m/s. How much work will have to be done to stop
18. Calculate the work done in cart
me in carrying a body of mass 10 kg to a roof of 5 m high. (8 = 10 m/s)
A man takes a body of 50 kg on the roof of a bus 2.5 m. Find how much
gravitational force? (8 = 9.8 m/s)
8 on the roof of a bus 2.5 m. Find how much work has he to do against
A coolie carries a load of 30 kg mass to a roof of bus 3 m high. How muc
nass to a roof of bus 3 m high. How much work has he to do against
gravitational force? (g = 10 m/s)
16. A body of mass 10 kg falling freely through air travels a distance of 10 m. Cal
through air travels a distance of 10 m. Calculate the work done.
(8 = 10 m/s)
17. A piece of stone of 5 kg weight is left to fall from the height of 10 m. Calculate its kinetic ener
time it strikes the earth. (8 = 10 m/s?)
18. A body o - K6 IS mited to a height of 4 m. How much change will take place in the potential energy
the body ? (8 = 10 m/s)
19. If the potential energy of a body at earth surface is assumed as zero. How much will be the potenti
energy of a body of 2 kg mass at bottom of 30 m deep well? (8 = 9.8 m/s)
20. A piece of stone of 100 g weight is allowed to fall from a height of 100 m. Calculate the velocity an
kinetic energy of the stone when it reaches the earth. (g = 10 m/s)
Hint: mu? = mgh = v= V2gh
21. A body of mass 2 kg falls freely, from a height of 100 m, under gravitational acceleration (8). Find
velocity and total energy at the moment it reaches the earth. (g = 10 m/s)
L indemned by 30% after striking​

Answer 1

Answer:

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