exam revision 2nd semester

Work is the force applied over a _______________.

• Mass

• Displacement

• Temperature

• Time

The SI Unit for Work is ____________.

• Joule

• Kilogram

• Metre

• Newton

Calculate the work done in pushing a shopping cart a displacement of 5m with a force of 100N.

• 5 Joules

• 50 Joules

• 500 Joules

• 5000 Joules

Kinetic energy is energy in _______________.

• the sky

• matched

• a box

• motion

What is potential energy?

• moving energy

• stored energy

• renewable energy

• non renewable energy

What are the two(2) types of Potential Energy?

• Motion

• Gravitational

• Elastic

• Sitting

At A, How much potential energy is there?

• 0%

• 25%

• 50%

• 100%

When you eat fruits and vegetables, chemical bonds are releasing stored energy, this is...

• a. thermal energy

• b. sound energy

• c. electrical energy

• d. chemical energy

Two factors that determine work are

• force

• acceleration

• mass

• distance

• velocity

Two workers use 100 N of force to move a sofa 2 meters in 2 seconds. How much power is required?

• 100 watts

• 400 watts

• 104 watts

• 50 watts