Name _________________________
Date ________ Period __________
Two children are on a merry go round – child A and child B. The merry go round completes one spin every 4 seconds.
Which child is going faster? Why?
Topic:
Objectives
Key Points:
• Position, displacement, velocity and acceleration can be converted to _____________
position, ________________ displacement, _____________ velocity and _____________
acceleration.
• A full ______________ can be expressed as _____________ radians or as
2𝜋
360
________________. You can between radians and degrees by using
or .
360
2𝜋
• Angular __________________ equations can be used to solve problems that have an angular
____________________.
What is
rotational
Kinematics?
What are
radians?
Radians are a type of ____________. One radian is angle represented by the ________________
of the circles ______________.
Example of
converting
between
radians and
degrees
Convert 90o to radians
Practice
180o = how many radians?
Convert 6 radians to degrees
4 radians is how many degrees?
What is
angular
Displacement?
What is
angular
velocity?
A record spins on a phonograph at 33 RPMS (revolutions per minute) clockwise. Find the angular
velocity of the record (answer in radians).
Angular
Velocity
Practice
Find the magnitude of the earths angular velocity in radians per second.
What is
angular
acceleration?
A unicyclist starts from rest and accelerates uniformly in a counter-clockwise direction to an
angular velocity of 15 RPMS in a time of 6 seconds. Find the angular acceleration of the wheel.
What are the
angular
Kinematic
Equations?
Practice
Problem
Group Practice
1.a
1.b
1.c
ANSWER KEY TO GROUP PRACTICE and EXIT QUIZ
1a.
1.c
EXIT QUIZ ANSWER
1b.
Name _____________________________
Date _________
Period______
Name _____________________________
Date _________
Period______
Name _____________________________
Date _________
Period______
Name _____________________________
Date _________
Period______