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WorksheetsSOL PS 10 Practice Test
Total questions: 30
Worksheet time: 15mins
The ramp on the back of a moving van is an example of what type of simple machine?
pulley
wedge
wheel and axle
inclined plane
A device that uses a combination of two or more simple machines is called a—
complex machine
compound device
double machine
compound machine
The diagram illustrates a 2nd class lever. Which action would make it a 1st class lever?
moving the fulcrum to the far left end of the beam
placing the fulcrum on top of the beam
moving the fulcrum to the center of the beam
removing the fulcrum
A car manufacturer reduces the mass of a car by 250 kg. If the new design is
otherwise identical to the old design, how will the new car compare to the old car?
It will need less force to move.
It will require more fuel to operate.
It will have a greater gravitational attraction to the road.
It will release more gas emissions.
Which is the result of using a more powerful motor to run an elevator?
The same amount of work is done in less time.
Less work is done in the same amount of time.
The same amount of time is needed to move the same distance.
A longer time is needed to move a shorter distance.
To complete a project, 200,000 Joules of work are needed. The time taken to
complete the project is 20 seconds. How much power is needed (in Joules per second)?
P = W/t
200,020 J/s
10,000 J/s
0.0001 J/s
1,000,000 J/s
A girl kicks a soccer ball into the air. Which of these best explains why the soccer ball
falls back to Earth?
The acceleration of the ball is unstable.
The motion of the ball is changed by external forces.
The pressure on the ball changes with altitude.
The force exerted on the ball is greater than gravity.
According to the chart, on which planet would a ball fall the fastest?
Earth
Jupiter
Neptune
Saturn
What is the velocity of a dancer moving 7 meters towards the left side of the stage over the course of 20 seconds?
Velocity = d/t (with direction)
0.35 m/s left
140 m/s left
0.35 m/s right
0.35 left
When a pulley is added to a pulley system, what happens to the amount of force needed to move the object?
The force needed to move the object remains the same.
The force needed to move the object decreases.
The force needed to move the object increases.
None of these answers is correct.
A manual can opener includes which of the following simple machines?
pulley
wheel and axle
lever
wedge
inclined plane
Four students left their school at the same time and traveled on Route 11. The speed limit on Route 11 is 55 mph. Which student drove at an average speed that was above the speed limit?
Average speed = total distance / total time
Student 3
student 1
student 4
student 2
Which value is a velocity?
47 km / hr
20 m / s
20 m/s North
16 mi/hr
Timothy runs 51 m in 14 s. What is his speed? S = d/t
3.6 m/s
714 m/s
0.28 m/s
36 m/s
The final velocity minus the initial velocity divided by time is the formula for —
constant speed
average speed
acceleration
ending velocity
A meteoroid changes speed from 2.0 km/s to 2.5 km/s in 0.06 seconds. What is the acceleration of the meteoroid?
Acceleration = (Vf - Vi) / change in time
0.03 km/s2
8.3 km/s2
16.7 km/s2
0.15 km/s2
"An object at rest tends to remain at rest unless acted upon by an outside force."
Which of Newton's laws of motion is defined?
3rd
2nd
4th
1st
Which of Newton's laws of motion explains why people should wear a seat belt in a moving vehicle?
Fourth law of motion
First law of motion
Second law of motion
Third law of motion
The acceleration of the sled depends on the force provided by the dogs and the mass of the sled. This is an example of which of Newton's Laws of Motion?
3rd
1st
4th
2nd
"For every action there is an equal and opposite reaction."
Which of Newton's laws of motion is defined?
4th
2nd
3rd
1st
Objects falling through air experience a type of friction called —
free fall
rolling friction
terminal velocity
air resistance
A force of 100 N acts upon an object with a mass of 75 kg. What is the object's acceleration?
Acceleration = force/mass
1.3 m/s2
130 m/s2
0.75 m/s2
7,500 m/s2
A 9.3 kg box is accelerating at a speed of 0.85 m/s2 on a conveyor belt. What amount of force is necessary to stop the box from moving?
Force = mass x acceleration
79.1 N
7.9 N
10.9 N
91.0 N
It took Bradley 45 s and 60 N of force to move a sofa 5m into a moving truck. How much power did he exert?
Power = Work / time
Work = Force x distance
1.33 W
300 W
12 W
6.67 W
By oiling the gears on her bike, Rosa decreases the friction between the moving parts and therefore increases the —
power of her bicycle
output force of her bicycle
input work of her bicycle
mechanical efficiency of her bicycle
Has work been done on the punching bag by the glove?
No, because the bag was moved both forward and backward.
Yes, because the glove provided a force that moved the bag through a distance.
Yes, because the bag moved in a different direction than the force that was applied by the glove.
No, because the bag did not move when it was struck by the glove.
The movement of an object is the result of —
equally applied forces
a push on the object
a pull on the object
unbalanced forces
The number of times a machine multiples your effort force is called—
mechanical efficiency
work
mechanical advantage
power
What is the reason why a compound machine can never be 100% efficient?
The fewer moving parts a compound machine has, the lower it's mechanical efficiency because it can't do much work.
Compound machines are always 100% efficient.
Compound machines are always above 100% efficiency.
The more moving parts a compound machine has, the lower it's mechanical efficiency due to friction.
Acceleration of an object moving in a circular path is called -
Centrifugal acceleration
Orbital acceleration
Centripetal acceleration
Velocital acceleration
