Question

a body has a mass of 60kg is moving with a speed 50m/s. find its kinetic energy​

Answer 1

this is answere

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Answer 2

Given,

Mass of the body = 60kg

Speed of body = 50m/s

So,

Kinetic Energy = 1/2 × m×v^2

=>K.E= 1/2 × 60 × 50 × 50.

=>K.E = 75000J

=>K.E = 75Kj or 7.5 ×10^4 J

Hence the kinetic energy of the body is 75 kj.

Remember

1)Kinetic energy is the energy that is present in an moving object or body.Any object that is in motion is said to be using kinetic energy.

Example=>

A car moving at an speed of 50km/hr

An aeroplane flying in the sky.

Formula of kinetic energy=> 1/2(m×v^2)

S.I Unit => Joules

2) Potential energy

It is energy stored in an body due to its relative position, state and composition.

It is mainly of two types=>

1) Gravitational Potential energy

2) Elastic potential energy

Potential energy= M×g×h

where g = 9.8m/s^2

S.I unit = Joules.

Examples=>

A raised weight.

A coiled Spring.