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Q.

A block of known mass is placed in front of a trolley as shown in the figure. When a known mass is kept on the pan, the trolley moves and hits the block and the block gets displaced. What type of energy is possessed by the trolley?

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a

Kinetic Energy

b

Thermal Energy

c

Chemical Energy

d

Electrical Energy

answer is A.

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Detailed Solution

A block of known mass is placed in front of a trolley, as shown in the figure. When a known mass is kept on the pan, the trolley moves and hits the block and the block gets displaced. The energy possessed by the trolley is Kinetic energy.
Kinetic energy:
“Kinetic energy is the energy associated with the movement of objects. Kinetic energy is directly proportional to the mass of the object (

m

) and the square of its velocity (

v

).”

K . E . = \frac{1}{2} m v^{2}

Potential energy:
“Potential energy is the energy that is stored in an object due to its position or configuration.”

P . E = mgh

Where

m

is the mass,

g

is the acceleration, and

h

is the height.
The trolley has energy due to its motion. Therefore, the type of energy the trolley possesses is Kinetic energy.

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