

Rotating Platform Project Reflection
Presentation
•
Physics
•
12th Grade
•
Medium
+1
Standards-aligned
Erik Malvik
Used 1+ times
FREE Resource
5 Slides • 21 Questions
1
Project Reflection
2
3
Centripetal Velocity
Formula
4
Centripetal force
5
Multiple Choice
Why does a car accelerate as it goes around a corner at the same speed?
Its direction changes
It doesn't
It slows down
Its speeds up
6
Multiple Choice
A car traveling at a constant 45 mph going around a curve is accelerating because
it is getting faster
it is getting slower
it is changing directions
it is not accelerating if it has a constant speed
7
Multiple Choice
To make an object move in a circle at a constant speed, a net force must always be directed _________
toward the center of the circle
away from the center of the circle
tangent to the circle
opposite to gravity
8
Multiple Choice
The force that causes circular motion is called the
centripetal force
centrifugal force
United Center Force
pi force
9
Multiple Choice
10
Multiple Choice
11
Multiple Choice
If a body moves around a fixed point, without changing its position it is said to be ___
Revolving
Rotating
At Rest
12
Multiple Choice
A body is traveling in a circle at a constant speed.
has a constant velocity
has no acceleration
has an inward acceleration
has an outward radial acceleration
13
Multiple Choice
14
Multiple Select
The centripetal acceleration of an object can be calculate by (select 2 answers):
rv2
mFcp
at2
ma
15
Multiple Choice
When using the term “uniform circular motion,” what do we mean by the term “uniform?”
The direction of the object’s velocity is constant.
The net force on the moving object is zero newtons.
The forces acting on the object are uniformly applied from all directions.
The motion occurs without the influence of the gravitational force
The motion of the object is at a constant speed.
16
Multiple Choice
The centripetal force is best explained by which of the following statements?
The centripetal force is the force on an object that is directed radially outward from the center of its orbit.
The centripetal force is the force on an orbiting object that is directed along a line that is tangent to the circle.
The centripetal force is the net force acting on an orbiting object that maintains it in uniform circular motion.
The centripetal force is a fundamental force of nature.
17
Multiple Select
The equations that relate centripetal force and acceleration to velocity:
Fc=rmv2
ac=rv2
ac=rmv2
Fc=rv2
18
Multiple Choice
To calculate the speed of something moving in a circle:
divide the circumference by the time
multiply the circumference by the time
divide the acceleration by the time
multiply the mass times the acceleration
19
Multiple Choice
A 450 kg car travelling at 20 m/s goes around a curve with a radius of 15 m. Determine the centripetal acceleration of the car?
600 m/s/s
26.7 m/s/s
1.3 m/s/s
0.67 m/s/s
20
Open Ended
Mr. Malvik puts a penny (m=2.5g) on a platform that has a coefficient of friction (μ = 0.25). Calculate the maximum static friction the platform can give the penny.
21
Open Ended
Mr. Malvik's 2.5g penny is travels around the platform (r=7.5cm) in 1.25 seconds. How fast is the penny moving?
22
Open Ended
Will Mr. Malvik's penny stay on the platform? Explain by calculating the centripetal force needed to keep the penny moving in a circle. Please show your work
23
Open Ended
Investigate the top 3 teams' platforms. Which do you think was better and why? Give evidence based on the physics of the situation.
24
Open Ended
One of Mr. Malvik's goals for this project was to introduce you to new things while building your platform. Write a paragraph explaining what you individually have learned from this project.
25
Open Ended
Reflect on your platform's performance. Given more time, what would you have done to improve your design? Please write at least five sentences and give evidence that supports your changes (from other's designs or from physics concepts).
26
Project Reflection
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