1. A solid cylinder has a mass of 5 kg and a radius of 30 cm. A torque of 40 Nm is applied to the cylinder. What will be...
1. A solid cylinder has a mass of 5 kg and a radius of 30 cm. A torque of 40 Nm is applied to the cylinder. What will be its angular acceleration?
a) 37.5 rad/s2
b) 59.3 rad/s2
c) 89.0 rad/s2
d) 178 rad/s2
2.
When an object is in static equilibrium
a) the net force on it is zero
b) the net torque on it is zero
c) the net force and net torque are zero
d) not enough information
3. A solid cylinder with a mass of 5 kg and a radius of 30 cm is rolling on a flat surface. The cylinder rolls with a speed of 2 m/s. What its kinetic energy?
a) 5 J
b) 10 J
c) 15 J
d) 20 J
4. A solid disk with a mass of 2.00 kg and a radius of 3.00 m is spinning with an angular velocity of 4.00 rad/s. What is the angular momentum of the disk?
a) 24 kg m2/s
b) 36 kg m2/s
c) 72 kg m2/s
d) 144 kg m2/s
5. A figure skater is rotating with her arms stretched out away from her body. As she pulls her arms in towards her body, what happens to her angular velocity?
a) it increases
b) it decreases
c) it says the same
d) not enough information
Homework Answers
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1. A solid cylinder has a mass of 5 kg and a radius of 30 cm. A torque of 40 Nm is applied to the cylinder. What will be...
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