Question

A boy of mass 50 kg is riding a bicycle with a speed 2 m/s. The bicycle has a mass of 10 kg . Calculate the total kinetic energy?​

Answer 1

$\LARGE{ \underline{\underline{ \bf{Required \: answer:}}}}$

GiveN:

• Mass of the boy = 50 kg
• Mass of the bicycle = 10 kg
• Speed of the system = 2 m/s

To FinD:

• Total kinetic energy of the system?

Step-by-Step Explanation:

Total mass of the system:

= 50 kg + 10 kg

= 60 kg

Finding K.E. by using Formula,

$\large{ \boxed{ \rm{KE = \frac{1}{2}m {v}^{2} }}}$

Plugging the values in the formula,

➛ KE of the system = 1/2 × 60 × 2² Joules

➛ KE of the system = 60 × 2 Joules

➛ KE of the system = 120 Joules

Hence,

• The total kinetic energy of the system is 120 Joules which is the energy possessed on virtue of its motion.

Answer 2

Explanation:

Given :

• A boy of mass 50 kg is riding .

• a bicycle with a speed 2 m/s.

• The bicycle has a mass of 10 kg .

To Find :

• Calculate the total kinetic energy?

Solution :

Concept :

• The energy which possess due to virtue of motion of the object is called kinetic energy.

Formulas :

Kinetic energy is equal to;

• 1 /2 × mv² where m is the mass in kg and v is the velocity in m/s

kinetic energy = 1 /2 × Total mass × V²

Substitute all Values :

kinetic energy = 1 /2 × 50 + 10 × 2²

kinetic energy = 1/2 × 60 × 4

kinetic energy = 30 × 4

kinetic energy = 120 joules

Hence, The total kinetic energy of the system is 120 Joules

More to know :

How to calculate Kinetic Energy ?

• kinetic energy can be calculated by various ways first one is by using the formula 1/2mv² and another method is to find the work done which is equal to the change in kinetic energy