JEOPARDY!

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Unit 5 Exam – PhysicsCircular & Harmonic Motion


JEOPARDY!

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Definitions Labs Demos/ Activities

Circular Motion

Harmonic Motion Empty


Define: Centripetal Acceleration


Any object moving in a circular path has an

acceleration pointing toward the center of the

circle.


Define: Period


The amount of time it takes for an object to travel one

revolution or cycle.


What is the equation for the Law of Universal Gravitation

and who derived it?


Newton


During uniform circular motion, what two things

need to remain constant?


Speed and Radius


Define: Weightlessness


A sensation someone experiences when they are in free-fall—when there are

no contact forces acting upon them.


How did we change the acceleration that the egg experienced into “g’s”?


Divide by the acceleration due to gravity—9.8 m/s/s.


For the Pendulum Lab, what did we graph in order to

calculate the acceleration due to gravity?


Squared Period vs. Length


In the Simple Harmonic Motion – Springs Lab, we discovered that the period

of a spring in simple harmonic motion depends only on what two things?


Mass and Spring Constant


In the Hooke’s Law Lab, we graphed Spring Force vs. Displacement. What was

the slope of the line?


The Spring Constant


During the airplane lab you measured the length of the string and the radius of the circle. Why did you need both of these distances?


You needed the length of the spring and the radius in order to calculate the angle that the string was making

with the vertical. This angle was then used to help

calculate the centripetal force.


In order to transfer the marble from the Styrofoam cup into

the paper cup, you had to spin the marble in a relatively fast circle around the inside of the Styrofoam cup. This circular motion created a force on the marble that pointed in which

direction?


Toward the center of the cup


When we swung a water cup on a platform in a circle over our heads, the cup didn’t fall off the platform and the water didn’t spill, even though the

centripetal force points toward the center. Why?


Inertia wants the cup to fly off in a direction tangent to

the circular path, but the platform keeps getting in

the way.


The spinning CDs worked based primarily on two

physics principles. Which two principles?


Centripetal force and inertia


When we dropped the wine glass, the centripetal force had to be greater than the force of _____ in order for

the glass to survive.


Gravity (or weight of the glass)


The ball and cup toy uses centripetal acceleration to cause the ball to travel in a circular path. What force

causes the centripetal acceleration?


Tension in the string


An object moving in circular motion travels a distance of

______ in one period.


Circumference 2r


There is always a centripetal acceleration during uniform circular motion because the _______ is always changing.


Velocity (the direction of the velocity vector is always

changing)


Use the circle provided to draw in the velocity vector and the acceleration vector for an object traveling in a clockwise circle. What is the angle between these

vectors?

Daily Double!!!


ac

v90 degrees


“Centrifugal Force” is really a fictitious force. People feel a sensation of being pressed outward when

traveling in a circle because of which physics principle?


Inertia. For example, on a circular fair ride the person wants to travel in a straight line (due to inertia) but the

ride keeps turning and getting in the way.


Where on the Earth would a person experience the least

circular velocity?


North or South Pole; the radius here is zero.


What is the equation that relates Frequency to

Period?


What is the equilibrium position of a spring?


The position that the spring naturally returns to when

there are forces acting on it.


Define: Spring Constant


A measure of the elasticity of a spring; how difficult it is to stretch or compress a

spring.


The period of a pendulum depends only on what two

things?


String length and acceleration due to gravity


How do you measure the period of a pendulum or an

oscillating spring?


In order to measure one full cycle, you must time from one

amplitude maximum to the next. For example, the left-most

position of the pendulum back to the left-most position of the pendulum. Or the top of the

oscillating spring back to the top of the oscillating spring.


Question 6-100


Answer


Question 6-200


Answer


Question 6-300


Answer


Question 6-400


Answer


Question 6-500


Answer

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