Energy

The amount of work done on an object in a unit time .

• Power

• Work

• Force

Is the energy that an object passes by virtue of being in motion .

• Kinetic energy

• Potential energy

• Chemical energy

• Thermal energy

= ½ x mass x speed square

• P.E.

• K.E.

• Power

Mass can be measured by ....................

• kilogram

• Newton

• Joule

• Watt

kinetic energy is measured by .......................

• 
• Joule or kg ,m/s

• Watt

• m/s

When the speed of an object increases the kinetic energy ..................

• decreases

• increases

• does not change

When the mass of an object increases the kinetic energy decreases .

• False

• true

Factors affecting kinetic energy

• speed and mass

• speed only

• mass only

• speed and position

The relation between mass and kinetic energy is .................proportional.

• inversely

• directly

• 100J

• 
• Both