Question

A cyclist and bike have a total mass of 100 kg and a speed of 15 m/s. Calculate the kinetic energy.​

Answer 1

Explanation:

m= 100kg , v= 15 m/s

KE=1/2 × 100 × (15)²

KE= 11250J

Answer 2

Given,

Mass of the cyclist and bike = 100 kg

Speed = 15 m/s

To find,

The amount of kinetic energy.

Solution,

We can simply solve this numerical problem by the following process.

Here, we have to use the following mathematical equation -

Kinetic energy = ½ × mass × (velocity)²

By, putting the given values we get,

Kinetic energy = [½ × 100 × (15)²] J

Kinetic energy = [½ × 100 × 225] J

Kinetic energy = (50 × 225) J

Kinetic energy = 11250 J

Kinetic energy = 11.25 kJ

(Term of unit conversion : 1000 J = 1 kJ)

Hence, the kinetic energy will be 11.25 kJ