11-HAMA

The energy of an object due to its motion is called

• kinetic energy

• potential energy

• gravitational potential energy

• none of them

The energy that can be stored by an object because of its physical condition or position is called

• gravitational potential energy

• All

• potential energy.

• elastic potential energy

The energy of an object due to its position in a gravitational field

• gravitational potential energy

• elastic potential

A wind turbine transforms mechanical energy of wind into

• potential energy

• kinetic energy

• electrical energy

• heat energy

Musical instruments transform mechanical energy into

• heat

• sound.

mechanical energy is

• sum of K and P energies

• K energy

• P energy

• all

If an external force does “positive” work, it will______ the mechanical energy

• increase

• decrease

• remain same

• none

friction force is a type of

• non-conservative force

• conservative

power is ______ quantity

• derived

• scalar

• vector

• derived and scalar

A horse is pulling a cart with a force of 250 N by 20 m in 50 s. What is the power of the horse?

• 209

• 206

• 202

• 208