Practice- Mechanical Advantage, Levers, Wheels

What part of the human body acts as the fulcrum in all lever systems?

Tags

NGSS.MS-PS2-1

How many classifications of levers are there?

• 3

• 2

• 5

• 4

In which position will the fulcrum be in relation to the effort and load in a first class lever system?

• On the left

• In the middle

• On the right

What type of lever, useful for overcoming large loads, can be found at the ankle when a basketball player jumps for a rebound?

• First class lever

• Second class lever

• Third class lever

Tags

NGSS.HS-PS2-1

What term defines the use of a lever to overcome a large load with relatively little effort?

• Mechanical disadvantage

• Mechanical advantage

• Resistance arm

Which class lever is this?

• First

• Second

• Third

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 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 input force

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

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