Free Printable Taher -physics -Rotational Motion

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Taher -physics -Rotational Motion

Total questions: 20

Worksheet time: 41mins

Name

Class

Date

the number of complete revolutions made by an object in 1s is called

frequency

angular velocity

angular acceleration

angular displacement

the angular displacement divided by the time required to make the rotation.

angular velocity

angular acceleration

angular displacement

angular period

he liner velocity of an object and angular velocity are related by

$v=r\omega$

$v=\frac{\omega2}{r}$

$v=\frac{\omega}{r^2}$

$v^2=r.\omega^2$

Find liner velocity of an object on Earth’s equator moves as a result of Earth’s rotation (Earth’s radius=6.4X10⁶m)

400 m/s

100 m/s

10m/s

Find the angular velocity of Earth

7.3 x 10^-5 rad/s

4.4 x 10^-3 rad/s

3.7 x 10^-5 rad/s

1.74 x10^-3

The Moon rotates once on its axis in 27.3 days. Its radius is 1.74×10⁶ m.

. What is the period of the Moon’s rotation in seconds?

2358720

39312

655.2

10.92

The Moon rotates once on its axis in 27.3 days. Its radius is 1.74×10⁶ m.

What is the frequency of the Moon’s rotation ?

4.2 x10^-7 Hz

2.5 x 10^-3 Hz

1.5x 10^-3 Hz

2.5 x10^-5 hz

motor rotate 6000 RPM , what is its angular velocity

2260800

628

37680

6000

A grindstone spinning at the rate of 8.3 rev/s has what approximate angular speed?

3.2 rad/s

26 rad/s

52 rad/s

81 rad/s

10.

The easiest way to open a heavy door is by applying the force

Near the hinges

In the middle of the door

At the edge of the door far from the hinges

At the top of the door

11.

What is the Unit for Torque

12.

The moment of inertia:

is synonymous with mass

does not depend on where the mass is located

resistance to a change in rotational inertia

more resistance to change = less inertia

13.

The number of complete revolutions per second is:

frequency

period

torque

rotational inertia

14.

The time required for one complete revolution is:

torque

frequency

period

rotational kinetic energy

15.

A wheel starting from rest is rotating with a constant angular acceleration of 3rad/s². What is its angular acceleration after 4s?

25rad

24rad

12rad

22rad

16.

Condition for maximum torque is

$\theta$ = 90 degree

$\theta$ =180 degree

$\theta$ = 0 degree

not defined

17.

The drum of a washing machine rotates 1800 times in 3 minutes. What is the period?

0.1 s

0.2 s

0.3 s

0.5 s

18.

A bolt on a car engine must be tightened with a torque of 35 N·m. You use a 25-cm-long wrench and pull the end of the wrench at an angle of 60.0° to the handle of the wrench.

How long is the lever arm? .......m ( 2 s.f.)

0.22

220

19.

A bolt on a car engine must be tightened with a torque of 35 N·m. You use a 25-cm-long wrench and pull the end of the wrench at an angle of 60.0° to the handle of the wrench.

how much force must you exert?.......N

1600

25.4

20.

You have a 0.234-m-long wrench.and you can exert a force of 232 N at right angle (. what is the torque ? $\theta=90$

73.1

54.3

991.5

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Taher -physics -Rotational Motion

Total questions: 20

Worksheet time: 41mins

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