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- Multiple ChoicePlease save your changes before editing any questions.
What force keeps an object moving in a circle?
centripetal force (inward)
centrifugal force (outward)
- Multiple ChoicePlease save your changes before editing any questions.
What happens if you let go of the string when you spin the stopper around your head?
the stopper continues moving in a circle
the stopper moves in a straight line
- Multiple ChoicePlease save your changes before editing any questions.
What is the equation for acceleration?
v = 2πr/T
a = v2/r
F = mv2/r
F = ma
- Multiple ChoicePlease save your changes before editing any questions.
What is the equation for centripetal force?
v = 2πr/T
a = v2/r
F = mv2/r
F = ma
- Multiple ChoicePlease save your changes before editing any questions.
Centripetal acceleration always pointsin the direction of the object's motionin the opposite direction of the object's motiontowards the center of the circletowards the outside of the circle - Multiple ChoicePlease save your changes before editing any questions.
A 10kg car travels at a constant speed of 20.0 m/s around a horizontal circular track. Which diagram correctly represent the direction of the car's velocity (v) and the direction of the centripetal force (Fc) acting on the car at a particular moment?
- Multiple ChoicePlease save your changes before editing any questions.A test car moves at a constant speed around a circular track. If the car is 48.2 m from the track's center and has a centripetal acceleration of 8.05 m/s2, what is the car's tangential speed?19.7 m/s5.99 m/s0.17 m/s388.01 m/s
- Multiple ChoicePlease save your changes before editing any questions.When an object is in circular motion it is constantly changing its velocity.TrueFalse
- Multiple ChoicePlease save your changes before editing any questions.Calculate the amount of centripetal force it takes for a softball pitcher to rotate a ball with a velocity of 3 m/s if the ball weighs .12 kg and her arm is .65 meters long..381.23.551.66 N
- Multiple ChoicePlease save your changes before editing any questions.Which of the following depict the speed of the blowing ball?ABCD