Question

The kinetic energy of an object of mass 'm' moving with a velocity of 5 m/s is 25 J. what will be its kinetic energy when its velocity is increased three times.​

Answer 1

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Here:

Kinetic Energy= 2/1 mv²

⟹25J= 2/1×m×(5)²

⟹ m= 25/50kg

⟹m = 2kg⟹m=2kg

Here we got the mass➝2kg

Now according to the situation:-

When velocity triples/becomes three times more:

Kinetic energy= 2/1 mv²

⟹Kinetic energy= 2/1 ×2×(15) 2

⟹Kinetic \: energy = 225J⟹Kineticenergy=225J

Hence the kinetic will be 225 Joule. Ans.