Deck 3: Angular Motion

Question 1

A body rotates at 4 rev/s. In 1 s it will rotate through:

A) 4 rad
B) 4π rad
C) 8 rad
D) 8π rad

Answer 1

D

Question 2

A body rotates with an angular velocity of 3 rad/s. It will thus make:

A) 3π rev/s
B) 3/2π rev/s
C) 6π rev/s
D) 6/π rev/s

Answer 2

B

Question 3

A flywheel starting from rest accelerates uniformly at 1 rad/s2. In 4 s it will complete:

A) 4 rad
B) 8 rad
C) 16 rad
D) 32 rad

Answer 3

B

Question 4

A flywheel rotating with an angular velocity of 2 rad/s is then uniformly accelerated at 2 rad/s2 for 2 s. Its angular velocity after this time will be:

A) 2 rad/s
B) 4 rad/s
C) 6 rad/s
D) 8 rad/s

Question 5

A wheel of radius 0.1 m is rotating at 3 rev/s. The peripheral velocity of a point on the wheel time is:

A) 0.3 m/s
B) 0.3π m/s
C) 0.6 m/s
D) D 0.6π m/s

Question 6

Decide whether each of these statements is True (T) or False
When the angular velocity of a wheel doubles:
(i) The number of revolutions per sec is doubled.
(ii) The angle through which the wheel rotates in 1 s is doubled.

A) (i) T (ii) T
B) (i) T (ii) F
C) (i) F (ii) T
D) (i) F (ii) F