kinetic energy of an object mass, m moving with a velocity of 5 ms-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?
Answers
Mass = m v=5 m/s K.E = 25 joule K.E =1/2 mv^2 25= m/2× 25 m= 1 × 2 = 2 joule When V= 2 v = 10 m/s K.E = 1/2 mv^2 = 1/2×2×10× 10 = 100 So kinetic energy will become 4 times
Here, in this given query in first case , we have to find out the mass,m by applying the formula of kinetic energy .
In the second case , we have to find out the kinetic energy by applying the formula of kinetic energy . Note - As given the velocity will be doubled. Suppose if the given velocity is 5 then if it is doubled then the new velocity will be
- 5 × 2 = 10
In the third case , we have to find out the kinetic energy by applying the formula of kinetic energy . Note - As given the velocity will be tripled . Suppose if the given velocity is 5 then if it is tripled then the new velocity will be
- 5 × 3 = 15