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Circular Motion Quiz #1 Review
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What force is causing the centripetal acceleration and centripetal force? *hint: what force is directed towards the center of the circular paht
normal force
What force is greater the normal force or the gravitational force? Why?
gravitational force because this is the force directed towards the center of the curved path
What force is greater the normal force or the gravitational force? Why?
normal force because this is the force directed towards the center of the curved path
What direction is the net force on the skateboarder?
up (towards the center)
An object is moving in a COUNTERCLOCKWISE circle at constant speed. What is the direction of the net force at point B?
left (towards the center)
An object is moving in a COUNTERCLOCKWISE circle at constant speed. What is the direction of the acceleration at point B?
left (towards the center)
An object is moving in a COUNTERCLOCKWISE circle at constant speed. What is the direction of the velocity vector at point B?
up
Why do you feel an outward force when your in a car and the driver makes a quick turn?
because your body wants to continue with the same speed and the same direction it was going prior to the turn, INERTIA
In uniform circular motion, the velocity is always ___________ to the circular path.
tangent (tangential velocity) or perpendicular
What do you know about the direction of the net force and acceleration?
they are in the same direction, in the case of uniform circular motion they are towards the center of the curved/circular path
T/F: If a car turns at a constant speed there is an acceleration.
true
Is acceleration a scalar or a vector?
vector
What is acceleration?
rate of change of velocity
For an object moving in uniform circular motion, does the velocity change?
yes, because the direction is changing
Is velocity a scalar or a vector?
vector
For an object moving in uniform circular motion, does the speed change?
no, because speed does not have a directional component
Is speed a scalar or a vector?
scalar
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