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{ (1)/(2) }} \: \sf \: or \: \: { \color{hotpink} \bold{ 0.5\: J}}\ \\`

— — — — — — — — — —

Formula:

• 
  `\underline{ \boxed{ \sf KE = (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 = (1)/(2)m {v}^(2) \\`

• 
  `\sf KE = (1)/(2) * 1 * {(1) {}^(2) } \\`

• 
  `\sf KE = (1)/(2) * 1 * {1} \\`

• 
  `\sf KE = \underline{ \boxed{ \blue{ (1)/(2) }}} \: \: or \: \: \underline{ \boxed{ \blue{ 0.5}}}`

Hence, the kinetic energy is ½ or 0.5 Joules.