eQuizShow

Simple Machines

Levers

Question: What muscle in the human body is a second class lever

a) foot
b) neck
c) arm
Answer: B) Neck

Question: What is a lever?
Answer: A lever is a simple machine made up of a bar that pivots or rotates

Question: How many classes of levers are there
Answer: 3

Question: What is the fulcrum
Answer: the point a liver pivots

Question: what is the mechanical advantage of a 3rd class lever?
A) more than one
B) less than one
C) none of the above
Answer: B) less than one

Wheel and Axel

Question: What is the wheel and axel
Answer: an axel attached to the center of a wheel and both rotate together

Question: What is another word for axel
Answer: Shaft

Question: what is the wheel in a screwdriver
Answer: the handle

Question: What is the equation for finding the ideal mechanical advantage for a wheel and axel?
Answer: Radius of the wheel (in meters) divided by the radius of the axle (in meters)

Question: What happens if the Wheel is larger than the axle?
Answer: The mechanical advantage will be greater than one.

Wedges and Screws

Question: What is a wedge?
Answer: A sloped surface that moves.

Question: True or False. a screw is an inclined plane?
Answer: True.

Question: True or false. A wedge is an inclined plane?
Answer: True.

Question: What pulls a screw into a material?
Answer: The output force.

Question: What part of the body is a wedge?
Answer: The teeth.

Pulleys

Question: What is a pulley?
Answer: A pulley is a simple machine that is a grooved wheel with a rope or a cable wrapped around it.

Question: How many types of pulleys are there?
Answer: 3

Question: What is a fixed pulley?
Answer: aa fixed pulley is a pulley only changes the direction of the force.

Question: What is a movable pulley?
Answer: A pulley attached to an object that is being lifted.

Question: What is a pulley sytem?
Answer: A pulley system is a combination of fixed and movable pulleys.

Compund machines and inclined planes

Question: An ______________________ is a flat sloped surface
Answer: Inclined Plane

Question: What two things do you need to know about an inclined plane?
Answer: The lenth and height of the inclined plane.

Question: True or False. a incliened plane decreases the amount of force needed?
Answer: True.

Question: How do you find the ideal mechanical advantage of an inclined plane?
Answer: Dividing the length of theinclined plane (inmeters by the height of the inclined plane (in meters).

Question: What is a coumpund machine?
Answer: Two or more simple machines that operate together.