Question

the an object of he kinetic energy omass, m moving with a velocity of 5 m s*-1 is 25 joule. what will be its kinetic energy when its velocity is doubled. what will be its kinetic energy when its velocity is increased three times.

Answer 1

Answer:

Kinetic energy is directly proportional to the mass of the object and to the square of its velocity: K.E. = 1/2 m v2. If the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.

Answer 2

Answer:

K.E.=1/2×m×v^2

25=1/2×m×5^2

m=2 kg

So if Velocity is doubled that means 2v

K.E.=1/2×5×(2v)^2

=1/2×5×100 (as v was 5 m/s before)

=250 J

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