MECHANICS OF MACHINE

It is defined as an activity done when a body or object moves with the application of external force is ________.

• Work

• Energy

• Mechanical Advantage

• velocity ratio

Work = Force × ___________

• acceleration

• density

• time

• displacement

Bicycle is an example of another ________machine.

• simple

• compound

• binary

• none of these

What is a simple machine?

• a device that has only one working motor
• a device that makes work easier
• a device that makes more work for a job
• device that is made up of two or more machines

A simple machine that consists a rigid bar that pivot about a fixed point

• lever
• pulley
• wheel and axle
• fulcrum 

The "fixed point" on which a lever rests and, or pivots is known as which of the following?

• screw
• wheel and axle
• see saw 
• fulcrum 

A seesaw is an example of which machine?

• wedge
• lever 
• inclined plane 
• pulley 

A door knob is an example of which machine?

• wheel and axle
• swrew
• pulley 
• inclined plane 

A _______ is a rope or chain wrapped around a wheel. 

• wedge 
• lever 
• pulley 
• screw

A 50 N block is lifted 10 m. How much work was done?

• 50000 J
• 5000 J
• 500 J
• 50 J