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WorksheetsWork and Machine
Total questions: 20
Worksheet time: 14mins
What is work?
(a)
What is power?
The amount of energy in an object
The amount of work done in one second
The amount of distance an object has moved
The amount of weight of an object
What is the equation of Work?
W= FxT
W= P/T
W= FxD
W= PxF
A man exerted a force of 9000N on a car that weighed 2871 pounds but was unable to move it . How much work was done?
(a)
Which of the following is work being done?
Grocery bag as you lift it up
A dog sitting on a bench
A crane digging dirt
A box that is being pushed across the floor
What is a machine?
(a)
Which of the following are machines
Knives
Doorknobs
Engine
Nails
Can machines change the direction of the force you apply?
No
Yes
How is energy related to work and machines?
(a)
What is power measured in?
Kelvin
Pascual
Watts
Joules
What is the formula of power?
P= w/d
P=w/f
P=w/t
P= PxF
To lift a pile of rocks from the ground 50J are required. How much power is needed to lift the rocks in .5
10 W
100 W
1000 W
1.0 W
What is a simple machine?
A machine that is small
A machine that works with only one movement
A machine that is made out of steel
A tool that is used as a lever
A combination of 2 or more simple machines is an?
Mechanical machines
Machines
Compound machines
Simple machines
If work stays the same and the distance is increased, then less force will be needed to do the work
true
false
What is the difference between output force and input force?
(a)
What is efficiency?
(a)
Can you make machines more efficient? How?
No, machines cant be more efficient they are what they are
Yes, machines can be cleaned by water
Yes ,machines can be more efficient by adding lubricant such as oil
No, machines can be fixed
What are simple machines consisting a shaft attached to a center of a large wheel?
Driver
Scissors
Spoon and fork
Wheel and axle
what is the IMA formula
IMA= radius of angle/ radius of circle
IMA= radius of wheel /radius of axle
IMA= radius of circle/diameter
IMA= radius of circle/ pi
