WorksheetsPhysics 11-12 Torque & Angular Momentum
Total questions: 17
Worksheet time: 48mins
Two children are sitting on a see-saw, as shown. Calculate the distance the 500-N child should sit from the fulcrum in the center (pivot) of the lever to balance the see-saw.
1.8 m
3m
5 m
1 m
If the torque required to loosen a nut on the wheel of a car has a magnitude of 60.0 N• m, what minimum perpendicular force must be exerted by a mechanic at the end of a 0.45 m wrench to loosen the nut?
.666 Nm
133.3 N
66.7 N
13.3 Nm
If the torque required to loosen a nut on the wheel of a car has a magnitude of 60.0 N• m, for a 0.45 m wrench to loosen the nut, how much torque would be needed if a pipe extended the length of the wrench to 0.90 m?
60 Nm
30 Nm
120 Nm
54 Nm
Which person will topple over?
Person A
Person B
Person C
Why are you more stable when riding a bicycle at a faster speed?
You have more mass
The wheels have angular momentum
It's not easier to ride at a faster speed
The bike has more momentum
A skater start spinning on the tips of her skates at low angular velocity with arm outstretched.
What would happen when she brings her arms close to her body
She will spin slower
She will spin faster
She will spin at the same velocity
If a child is sitting on the outside edge of a merry-go-round and you push it to double the rotational velocity (ω) from 5 rpm to 10 rpm, what happens to the angular momentum (L)?
the angular momentum doubles
the angular momentum is reduced by half
the angular momentum quadruples
Why would it be harder to stop the merry-go-round at 10 rotations per minute that when it was going 5 rotations per minute?
the angular momentum is greater with a higher angular velocity and will require a larger torque to stop the motion.
it won't because the angular momentum is the same for both angular speeds.
What happens to her rotational inertia when a figure skater brings in her arms?
Increase her rotational inertia
Decrease her rotational inertia
has no affect
Why does an object experiencing uniform circular motion have an acceleration?
because it is changing speed
because it is changing direction
because it is moving in a straight line
because it has mass
In uniform circular motion, which two variables point toward the center of the circle?
the centripetal force and the acceleration
the velocity and the mass
the period and the mass
the time and the radius
The _______________________ supplies the centripetal force requirement for the car to move in a horizontal circle. Without it, the car would turn its wheels but would not move in a circle (as is the case on an icy surface).
friction force
centrifugal force
normal force
applied force
Which of the following statements is true?
As the Earth orbits the Sun, the Earth's acceleration vector is toward the Sun.
If the Moon suddenly broke free of its orbit around the Earth, it would crash into the Earth.
The International Space Station remains in Earth orbit because of its mass.
The Earth and Neptune take the same amount of time to make one orbit around the Sun.
For the FLYING PIG diagram, Does the pig accelerate in the vertical direction?
What does this tell you about the magnitude of the vertical component of T and mg? (If you don't know, ask Irene ;)
These are the formulas you will use on the test.
