Uniform circular motion

Centripetal force is an acceleration of an object moving in circular path whose direction is _________________________of the circular path and whose magnitude is equal to the square of the speed divided by the radius.

• towards the tangent

• towards the centre

• towards the minimum point

• towards the maximum point

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NGSS.HS-PS2-1

Which represents the acceleration of the ball?

• A
• B
• C
• D

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NGSS.HS-PS2-1

The _______________________ supplies the centripetal force requirement for the car to move in a horizontal circle. Without it, the car would turn its wheels but would not move in a circle (as is the case on an icy surface).

• friction force

• centrifugal force

• normal force

• applied force

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NGSS.HS-PS2-1

At the instant shown in the diagram, the car's centripetal acceleration is directed-

• toward E

• toward N

• toward W

• clockwise

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NGSS.HS-PS2-1

At the position shown in the diagram, which arrow indicates the direction the instantaneous (tangential) velocity of the cart?

• A

• B

• C

• D

What happens to an object's speed as the radius decreases?

• It increases.
• It decreases.
• It remains unchanged.

Calculate the velocity of an object moved around a circle with a radius of 1.65 m and an acceleration of 3.5 m/s².

• 2.4 m/s
• 3.6 m/s
• 3.9 m/s
• 4.2 m/s

Tags

NGSS.HS-PS2-1

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/s
• 5.99 m/s
• 0.17 m/s
• 388.01 m/s

Tags

NGSS.HS-PS2-1

A merry-go round with a radius of 3 m moves at a rate in which it completes a complete revolution in 5 s. what is the acceleration if the speed is constant. tenths

(a)  

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NGSS.HS-PS2-1

A merry-go round with a radius of 3 m moves at a rate in which it completes a complete revolution in 5 s. what is the net force of a 19 kg child sitting 1 meter from the outer edge of the merry-go round if the speed is constant. ones

(a)  

Tags

NGSS.HS-PS2-1