Rotational Motion

Front

2600 rev/min is equivalent to which of the following? Options: 2600 rad/s, 43.3 rad/s, 273 rad/s, 60 rad/s

Back

273 rad/s

Front

A grindstone spinning at the rate of 8.3 rev/s has what approximate angular speed? Options: 3.2 rad/s, 26 rad/s, 52 rad/s, 81 rad/s

Back

52 rad/s

Front

A 0.12-m-radius grinding wheel takes 5.5 s to speed up from 2.0 rad/s to 11.0 rad/s. What is the wheel's average angular acceleration?

Back

1.6 rad/s/s

Front

What is the angular speed about the rotational axis of the Earth for a person standing on the surface? Options: 7.3 x 10^-5 rad/s, 3.6 x 10^-5 rad/s, 6.28 x 10^-5 rad/s, 3.14 x 10^-5 rad/s

Back

7.3 x 10^-5 rad/s

Front

A spool of thread has an average radius of 1.00 cm. If the spool contains 62.8 m of thread, how many turns of thread are on the spool?

Back

1000

Front

A 0.30m radius automobile tire rotates how many rad after starting from rest and accelerating at a constant 2.0 rad/s² over a 5.0 s interval?

Back

25 rad

Front

A fan blade, initially at rest, rotates with a constant acceleration of 0.025 rad/s². What is its angular speed at the instant it goes through an angular displacement of 4.2 rad?

Back

0.46 rad/s

Front

A fan blade, initially at rest, rotates with a constant acceleration of 0.025 rad/s². What is the time interval required for it to reach a 4.2 rad displacement after starting from rest?

Back

18 s

Front

A Ferris wheel starts at rest and builds up to a final angular speed of 0.70 rad/s while rotating through an angular displacement of 4.9 rad. What is its average angular acceleration?

Back

0.05 rad/s/s

Front

A Ferris wheel, rotating initially at an angular speed of 0.50 rad/s, accelerates over a 7.0-s interval at a rate of 0.040 rad/s². What is its angular speed after this 7-s interval?

Back

0.78 rad/s