Elite Private School
Subject: Physics
Grade
Section:
Level:11
Topic: Equations for Rotational Kinematics HW
Name:
Standard: HS-PS2-1
1) A rotating machine has an initial angular speed of 1.6 rad/s accelerates uniformly at a rate
of 0.5 rad/s2 for 5.0 seconds.
A) What is its angular displacement during this time? (14.25 rad)
B) How many revolutions is this? (2.26 revolution)
2) DJ speeds up a turntable uniformly from 33.3 rpm to 45 rpm. In doing so, the turntable
goes through 4 revolutions. What is the angular acceleration of the table? (0.194 rad/s2)
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3) A flywheel slows from 250 rpm to 150 rpm in 4.2 seconds. How many revolutions occur
during this time? (14 revolution)
4) A disc starting from rest experiences a constant angular acceleration of 5.7 rad/s2. The
disc goes through a total angular displacement of 43.0 radians
a) What is its angular velocity after this rotation? (22.14 rad/s)
b) How long did this change in angular velocity take? (3.88s)
5) A Ferris wheel, rotating initially at an angular velocity of 0.82 rad/s, accelerates over a
3.05-second interval at a rate of 0.060 rad/s2
a) What angular displacement does the Ferris wheel undergo in this interval of
time?(2.78 rad)
b) What is the final angular velocity of the ride? (1 rad/s)
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