WorksheetsUsing Machines
Total questions: 15
Worksheet time: 15mins
The _____________ of a machine is the ratio of the output work to the input work.
Weight
Time
Efficiency
Base
The ideal mechanical advantage, or _________, is the mechanical advantage if no friction existed.
IMA
MIA
IAM
AIM
Machines cannot operate at ideal mechanical advantage because ___________ always exists.
Weight
Time
Limits
Frictions
Because output work is always less than input work, a machines efficiency is always less than ______ percent.
1
200
100
150
You can ______________ the efficiency of a machine by maintaining and lubricating its moving parts.
Increase
Copy
Decrease
Lower
A mechanical advantage greater than _____ means the output force is greater than the input force.
5
2
4
1
You input 100 J of work to a machine that gives
50 J of work output.
What is the machine's efficiency?
0.5 %
50%
200 %
5000%
You push down on a lever with a force of 100 N to lift a 500 N box.
What is the mechanical advantage of the machine?
500
100
5
0.2
The force applied on the can is 30 N
when you twisted the can opener with 10 N
What is the mechanical advantage of the machine?
40
30
10
3
What is the efficiency of a machine if 55.3 J of work are done on the machine and 14.3 J is produced by the machine?
0.25 J
26%
386%
3.86 J
When you use a machine to move an object, Input Force is
The Force that you applied on the object
The Force that you applied to the machine
Force applied to the object by the machine
Force applied to the machine by the object
When you use a machine to move an object, Output Force is
The Force that you applied on the object
The Force that you applied to the machine
Force applied to the object by the machine
Force applied to the machine by the object
What is the primary function of a lever in a simple machine?
To increase speed
To change direction
To multiply force
To reduce friction
In a pulley system, if the input force is 50 N and the output force is 150 N, what is the mechanical advantage?
1
2
3
4
Which of the following is an example of a compound machine?
Scissors
Inclined plane
Wheel and axle
Pulley
