WORK AND MECHANICAL ADVANTAGE

How much work is produced when 350 N is used to move a car 5 m?

• 70 J

• 1750 J

• 355 J

• 175 J

What is mechanical advantage?

• The advantage a machine has over a bicycle

• A measure of how much a simple machine reduces work

• A measure of when is the best time to use a simple machine

• the number of times a machine increases the input force

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

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

Tags

NGSS.MS-PS2-2

What is resistance (output) force?

• the force required by a machine in order to accomplish work (the force you put on the machine)

• The force that is exerted by a machine

• the force the machine exerts on a object

• the output work times the input distance

Tags

NGSS.HS-PS2-1

Using a lever, Joe is able to lift a 10,000 N car off of the ground with a force of 1000 N. What is the mechanical advantage of the lever (MA=Output Force/Input Force)?

• 1

• 10

• 100

• 1000

• 10, 000

The mechanical advantage of this inclined plane is...

• 2.4

• 3.4

• 4.4

Tags

NGSS.MS-ETS1-1

Is this an example of work? 
A waiter carries a tray full of meals above his head by one arm straight across the room at constant speed. 

• True
• False

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

• True
• False

Out of these which one is an inclined plane, that can make work most easier?

• 1

• 2

• both

• none

How does distance change the effort when using an inclined plane?

• as distance increases, effort (INPUT FORCE) decreases

• as distance decreases, effort (INPUT FORCE) decreases

• as distance increases, effort (INPUT FORCE) increases

• nothing, they both stay the same