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WorksheetsUnit-7b Practice Test (Grav. Accel, Work, & MA Problems)
Total questions: 20
Worksheet time: 40mins
If a ball is lifted 2 meters off the ground and 5 newtons of force was used to move it, what amount of work has been done?
0.4 joules
2.5 joules
10 joules
3 joules
When 142 joules of work is done in pushing a box horizontally 13.3 meters, how much force is applied?
10.67 joules
10.67 newtons
1,888.6 joules
1,888.6 newtons
If the amount of work done on a box was 10 joules and the force required to move the box was 2.5 newtons, how far was the box moved?
4 meters
25 meters
7.5 meters
12.5 meters
A lever has an effort force of 5 newtons and a resistance force of 15 newtons. What is the mechanical advantage of the lever?
10
20
75
3
You use a pulley system with a mechanical advantage of 5. How heavy of a load can you lift with an effort force of 200 newtons?
40 N
1000 N
195 N
205 N
A lever has a 5 meter long effort arm and a 2 meter long resistance arm. What is the mechanical advantage of the lever?
10
2.5
3
7
A lever has a 5 meter long effort arm and a 2 meter long resistance arm. If the applied effort force is 100 newtons, what is the maximum resistance force that can be lifted with this lever?
500 N
250 N
200 N
50 N
The length of a handicap ramp is 8 meters long and the rise is 4 meters. What is the mechanical advantage of the inclined plane?
2
0.5
32
4
The lever's effort arm is 24 cm and the resistance force arm is 8 cm long. What is the mechanical advantage of the lever?
16
32
0.33
3
The lever's effort arm is 24 cm and the resistance force arm is 8 cm long. How much force is required to lift the 300 N load?
100 N
37.5 N
12.5 N
300 N
A 50 kg box is lifted 5 meters off the ground. How much work was done?
Hint: Acceleraration of gravity is 9.8 m/s2
2,450 joules
10 joules
250 joules
45 joules
What is the mechanical advantage of this pulley system?
1
2
3
4
5
How much effort force is required to lift a 400 kg load?
100 kg
200 kg
300 kg
400 kg
If a pulley system can lift a 600 newton load with an effort force of 50 newtons, how many "sections" of rope does the pulley system have?
50
12
10
2
A 10 kg rock sample collected on Jupiter will weigh 259.5 N. What happens to that weight when the rock is taken back to Earth?
The mass will increase due to the decreasing gravity of earth.
The weight will increase due the decreasing gravity of earth.
The weight will decrease due to the decreasing gravity of earth.
The weight never changes.
A change in which of the following would affect the weight of an object?
Inertia
Velocity
Acceleration due to gravity
Friction
Looking at the graph above, we can see that on Earth the person has a mass of 80 kg. Based on the information above about the weight of a person on different planets, what can you conclude about the gravity on those different planets?
That Mercury has the largest gravity.
That Jupiter has the largest gravity.
That gravity has no effect on weight.
That gravity is the same on all planets.
When an astronaut lands on the moon, which physical property will change?
Density
Mass
Shape
Weight
A change in which of the following would affect the weight of an object?
Volume
Friction
Acceleration due to gravity
Velocity
Once dropped, how far will the rock travel in 6 seconds?
Hint: Acceleraration of gravity is 9.8 m/s2
9.8 m/s2
9.8 mph
58.8 m
58.8 feet
