Acceleration
The direction of centripetal acceleration...
Towards the middle of the circle.
Do objects need a force to move along a circular path?
Yes
Which would need the most force to make the turn?
a) Fire truck
b) Mini cooper
c) SUV
A) Fire truck
What is the unit for centripetal acceleration?
m/s2
A yoyo is swung in a circle by a rope. What provides the centripetal force?
Tension
Objects moving along a circle are accelerating because...
Their direction is changing.
The name of the force that causes objects to turn (or move in a circle) is...
Centripetal Force
Centripetal force is inversely proportional to...
the radius of the circle.
What information do you need to calculate centripetal acceleration?
speed and radius
Your car rounds a curve in the road. What provides the centripetal force?
Increasing the speed of an object will cause the centripetal acceleration to...
increase as well.
The direction of centripetal force is...
Towards the middle of the circle.
Centripetal force is directly proportional to...
mass and speed
What centripetal force is needed to accelerate a 3 kg mass at a rate of 2 m/s2?
6 N
Draw a circle that shows the direction of the objects speed as it moves in a clockwise path.
Is it straight ahead?
decrease.
The centripetal force equation is...
F = ma
When the force stops the object will...
travel in a straight line
What is the centripetal acceleration of an object whose speed is 4 m/s while turning in along a circular path whose radius is 8 m?
2 N
Give an example of something revolving.
Anything that is moving in a circle
v2/r
When the centripetal force stops the object will...
Continue moving in a straight line.
If there is only 300 N of friction between the tires and the road, and your car requires a 400 N to round the turn, what should you do?
Slow down or take the turn wider.
18 N
Why do people think there is an outward force?
Intertia carries objects in a straight line.