Work Power and Simple Machines

A person carries a box that weighs 200 N over 20 m. How much work is done?

• 0 J

• 200 J

• 40,000 J

• 400,000 J

Which of the following are types of Simple Machines?

• Ladder

• Screw

• Gears

• Inclined Plane

• Wheel and Axel

An axe is an example of which simple machine?

• Pulley

• Inclined Plane

• Wedge

• Wheel and Axle

• Screw

Which of these is true about all simple machines?

• All simple machines make you do less work

• All simple machines make work easier

• All simple machines make you do more work

• All simple machines make work faster

A machine that is made of two or more simple machines is called a...

• Construction Machine

• Complex Machine

• Compound Machine

• Working Machine

Tags

NGSS.MS-PS2-1

Work is only done when an object (a)  

• moves

• stays still

• articulates

• conjugates

Tags

NGSS.MS-PS3-5

Due to (a)   , the work put into a machine is always greater than the work output

• energy

• efficiency

• friction

• mass

The ratio of work output to work input is called

(a)   . ​ (b)   numbers are better. The stocks (old timey handcuffs) on Aang have a very low amount of this.

• energy

• efficiency

• friction

• mass

• Higher

• Lower

It takes Appa a force of 200N to carry the kids 1,000 km. How much work has he done? (a)  

• 1200 Joules of work

• 500 Joules of work

• No work has been done

• 200,000 Joules of work

Tags

NGSS.MS-PS2-2

Toph pushes against the turret with 500 Newtons of Force. It stays in place.

• 1000 Joules of work

• 500 Joules of work

• 0 Joules of work

• Excessive force leads to work being done

• No movement, no work

• Force was applied and an object moved

Tags

NGSS.MS-PS2-2