1.
Which of the following is an example of a first-class lever?
Wheelbarrow
Nutcracker
Crowbar
Tweezers
2.
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
3.
Which of the following materials has the highest tensile strength?
Copper
Aluminum
Steel
Brass
4.
What is the mechanical advantage of a pulley system with three pulleys?
1
2
3
6
5.
In a pulley system, what happens to the force required to lift a load when the number of pulleys is increased?
It increases
It decreases
It remains the same
It becomes zero
6.
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.
7.
Which of the following gears would provide the greatest speed reduction?
1:1 gear ratio
2:1 gear ratio
1:2 gear ratio
3:1 gear ratio
8.
A hydraulic system uses a small piston to exert a large force on a larger piston. If the small piston has an area of 2 square inches and the large piston has an area of 10 square inches, what is the mechanical advantage of the system?
0.2
2
5
10
9.
Which of the following tools is best suited for measuring the inside diameter of a pipe?
Tape measure
Caliper
Protractor
Plumb bob
10.
Which of the following is an example of potential energy?
A moving car
A stretched rubber band
A spinning top
A burning candle
Questions Answered: 0/10