WorksheetsSimple machine
Total questions: 15
Worksheet time: 51mins
A ___________ is a device that changes the force or increases the motion from work.
Work
Job
Machine
Calculator
The purpose of machines is to _______________.
Make us look cool
Make work easier
Change the way work is done
_____________ is a measure of how much of the work is changed into useful work
Efficiency
Energy
Joule
Newton
What is the equation for efficiency (%)
output work divided by input work x 100
input work divided by output work x 100
output work divided by net force x 100
Input work divided by net force x 100
Machines can be made more efficient by ____________.
Increasing input
Decreasing energy
Increasing friction
Reducing friction
(a) = output force / input force
What is the mechanical advantage for a crate that weighs 950 N and is lifted with a pulley force of 250 N.
1.5
2.0
3.8
4.0
You do 20 J of work in pushing a crate up a ramp. If the output work from the inclined plane is 11 J, then what is the efficiency of the inclined plane?
55%
45%
55J
55N
What do you call multiple pulleys working together?
multi-pulley
Block-and-Tackle
Mechanical Advantage
The amount the resistance end of a lever moves is called the _________.
Output Distance
Output Work
Output Force
The factor by which a simple machine makes doing work feel easier.
Input Force
Efficiency
Mechanical Advantage
