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22 Cards in this Set
- Front
- Back
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Uniform circular motion
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is the motion of an object in a circle with a constant or uniform speed.
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The distance of one complete cycle around the perimeter of a circle is known as
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the circumference
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the time to make one cycle around the circle
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T (period).
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The best word that can be used to describe the direction of the velocity vector
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a tangent line drawn to the circle at the object's location. Also 90 degrees to the centripetal acceleration.
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The acceleration for an object in circular motion is in what direction? |
towards the center of the circle |
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Centripetal force is always in the same direction as |
the centripetal acceleration |
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What causes an object to move in the direction opposite of the direction they are turning in? (car making a sharp right turn, you get pushed to the left against the door) |
Inertia |
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Centripetal forces are caused by |
other forces (Fg, Fn, Fa, Ff, Ft) |
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What causes you to feel pushed against the outer edge of a spinning ride? |
Inertia- This is not an actual force. Inertia is the tendency of an object to resist a change in motion. Your body wants to continue moving in a straight line but the spinning makes you change direction and you get pushed against the wall. |
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The inward force is labeled as |
positive |
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The outward force is labeled as |
negative |
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The tension for an object attached to a string being swung in a circle is always in what direction? |
toward the center of the circle (inward) |
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At least one of the forces causing circular motion must be pointing in what direction? |
toward the center of the circle |
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What forces allow a roller coaster to travel through a circular loop? |
normal force and gravitational force |
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What force causes an object attached to a string to stay in circular motion? |
tension force |
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What force causes a car to be able to travel around a curved road? |
friction force |
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Why does an object moving in circular motion have an acceleration even though it is moving at a constant speed? |
change in direction |
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For an object in uniform circular motion, what must be constant? |
speed |
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Degree that an object attracts other objects is measured by |
gravitational field strength |
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What do the variables in the Fg equation stand for? |
G=universal gravitation constant, m=mass, r=distance from center to center of each mass |
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If the radius of an object in circular motion is quadrupled and the force was originally 80 N, what will the new force be? |
It decreases by 1/4 so the new force would be 20 N |
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Does mass change based on what planet you are on? |
No but weight(Fg) does because of the change in gravitational field strength on different planets. |
