Uniform Circular Motion

Which of the following is the best description of what is being depicted (only one answer is correct)?

• Tangential Velocity

• Centripetal Acceleration

• Axis of rotation

• Angular velocity

If a ball is swinging at the end of a rope and the rope is suddenly cut, assuming there is no gravity, what best describes the path it will take?

• It will fly in a straight line forward from where it was cut

• It will fly in a curved line away from the circle

• It will fly inward toward the circle

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What best describes the relationship between axis of rotation and tangential velocity?

• A longer axis of rotation leads to a higher tangent velocity

• A shorter axis of rotation gives a lower tangent velocity

• A shorter axis of rotation gives a higher tangent velocity

• A relationship can not be determined

Describe the relationship between the suspended mass and the tangential velocity (from the lab)

• The greater the susp. mass the greater the tangent velocity

• There was no relationship

• Lighter suspended masses had greater tangential velocity

Which is true about centripetal force and centripetal acceleration?

• The centripetal acceleration is always pointing toward the center of an orbit and the centripetal force is always pointing outward

• The centripetal acceleration is always pointing outward from the center of an orbit and the centripetal force is always pointing inward

• The centripetal acceleration is always pointing toward the center of an orbit and the centripetal force also pointing toward the center but in a totally different location

• The centripetal acceleration is always pointing toward the center of an orbit and the centripetal force also pointing toward the center and in the same exact location as the centripetal acceleration

A toy train moves in a circular track with a velocity of 2.2 m/s, the axis of rotation is 1.8 m. What is its centripetal acceleration?

• 1.22 m/s²

• 0.81 m/s²

• 2.69 m/s²

• 1.47 m/s²

Tags

NGSS.HS-PS2-1

A few hoodlums are doing doughnuts in the parking lot of a doughnut shop. The El Dorado is reading 20 m/s (weird units for a car) and the radius is a tight 4.5 m. If the car and the girls in it have a collective mass of 1,200 kg, what is the centripetal force on them?

• 1215 N

• 106,666 N

• 270 N

• 5333 N

A drunken fly buzzes home to his wife and kids in circles of 5 cm, his velocity is 0.2 m/s. What is his centripetal acceleration?

• 125 m/s²

• 0.8 m/s²

• 10 m/s²

• 0.04 m/s²

What is the tangential velocity if the centripetal force is 150 N when a 3 kg toy plane flies in a 2 m radius circle?

• 10 m/s

• 100 m/s

• 225 m/s

• 15 m/s

Tags

NGSS.HS-PS2-1

If a flying pig is anchored to a string and allowed to fly straight forward, what pathway will he follow?

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Tags

NGSS.HS-PS2-1