Question

A 1kg mass is moving at 1m/s. What is its kinetic energy?

Answer 1

KINETIC ENERGY

Problem:

A 1kg mass is moving at 1m/s. What is its kinetic energy?

Answer:

• ${ \color{hotpink} \bold{ \frac{1}{2} }} \: \sf \: or \: \: { \color{hotpink} \bold{ 0.5\: J}}$

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Formula:

• $\underline{ \boxed{ \sf KE = \frac{1}{2} mv²}}$

where,

• KE is the Kinetic Energy in joules (J)
• m is the mass in kilograms (kg)
• v is the velocity in meter per second squared (m/s²)

Solution:

• $\sf KE = \frac{1}{2}m {v}^{2}$

• $\sf KE = \frac{1}{2} \times 1 \times {(1) {}^{2} }$

• $\sf KE = \frac{1}{2} \times 1 \times {1}$

• $\sf KE = \underline{ \boxed{ \blue{ \frac{1}{2} }}} \: \: or \: \: \underline{ \boxed{ \blue{ 0.5}}}$

Hence, the kinetic energy is ½ or 0.5 Joules.