Work and MA

How much work is produced when 350 N is used to move a car 5 m (W=Fd)?

• 70 J
• 1750 J
• 355 J
• 175 J

What is effort (input) force?

• the force one exerts on a machine

• the force which an effort force must overcome in order to do work on an object via a simple machine.

• the force the machine exerts on a object

• the output work times the input distance

If the weight of the block is 10N, how much force does one have to apply to lift it using this pulley (MA=2)?

• 2N
• 5N
• 10N
• 15N

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

What is the mechanical advantage of this pulley system?

• 2
• 3
• 4
• 5

Tags

NGSS.MS-PS2-4

What is the unit of measurement for work?

• Newtons
• Joules 
• Watts
• Meters

Tags

NGSS.HS-PS3-2

If a student uses 10 Newtons of Force to push a chair 5 meters, how much is work is being done?

• 2 Joules
• .5 Joules
• 50 Joules
• 20 Newtons

If a lion drags his prey 10 meters to his den doing 500 joules of work, how much force did he use?

• 50 Newtons
• 500 Joules
• 50,000 Newtons
• 10 Newtons

Tags

NGSS.MS-PS2-2

Is this an example of work?
A teacher applies a force to a wall and becomes exhausted.

• True
• False

Is this an example of work? 
A rocket accelerates through space.

• True
• False

Tags

NGSS.HS-PS2-1

Which of the following is an example of work being done?

• Teacher sitting in a chair
• Book resting on desk
• Keys hanging from a key chain
• A ball being rolled on the floor

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5