FORCE , ENERGY AND SIMPLE MACHINES

Staircase is an example of _______

• Wedge

• Pulley

• Wheel and axle

• Inclined plane

Above figure is an example of

• 1st class lever

• 2nd class lever

• 3rd class lever

• none

What type of simple machine is this?

• Wheel and axle

• lever

• Pulley

• Inclined plane

What type of energy we get from the food we eat?

• Chemical

• Light

• Thermal

• Sound

Kinetic energy is _______

• Energy stored in food

• Energy of a stone kept at a point

• Energy of a moving vehicle

• Energy of an inflated balloon

A simple machine is a device that helps to reduce the amount of _____ required to work.

• force
• energy
• work

A simple machine that can split things apart or hold a door open.

• wedge
• screw
• lever

Which choice is an example of an inclined plane?

• A ramp
• Seesaw
• Bottle Cap
• Ferris Wheel 

If an object does not move when a force is applied to it

•  work is NOT done
• work is done

Name this simple machine.

• Lever
• Wedge
• Pulley
• Inclined Plane