1.
Two gears are meshed together. The larger gear has 40 teeth, and the smaller gear has 20 teeth. If the larger gear rotates at 60 revolutions per minute (RPM), what is the rotational speed of the smaller gear?
30 RPM
60 RPM
120 RPM
240 RPM
2.
Which of the following materials has the highest tensile strength?
Copper
Aluminum
Steel
Brass
3.
A lever is used to lift a heavy object. If the distance from the fulcrum to the point where the force is applied is doubled, what happens to the amount of force needed to lift the object?
It is halved.
It remains the same.
It is doubled.
It is quadrupled.
4.
Which of the following is an example of potential energy?
A moving car
A stretched rubber band
A spinning top
A burning candle
5.
A gear system consists of a small gear with 10 teeth and a larger gear with 40 teeth. If the small gear turns once, how many times does the larger gear turn?
1/4
1/2
1
4
6.
What is the primary function of a flywheel in a mechanical system?
To increase speed
To store energy
To reduce friction
To change direction
7.
In a system of gears, what happens to the speed of rotation of the output gear if it has fewer teeth than the input gear?
It rotates faster.
It rotates slower.
It does not affect speed.
It stops rotating.
8.
What is the mechanical advantage of a pulley system with three pulleys?
1
2
3
6
9.
What is the primary purpose of a flywheel in a mechanical system?
To increase speed
To store energy
To decrease weight
To change direction
10.
Which of the following is NOT a type of simple machine?
Lever
Pulley
Wheel and axle
Engine
Questions Answered: 0/10