Centripetal

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?

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Tags

NGSS.HS-PS2-1

Which of the following depict the tangential speed(velocity) of the blowing ball as it moves in a circular path?

• A

• B

• C

• D

Tags

NGSS.MS-PS3-1

Gravitational Force Review: If you increase the distance between 2 masses(separate them), then the gravitational force between them _______________.

• increases

• decreases

• stays the same

Centripetal acceleration and force always point

• in the direction of the object's motion

• in the opposite direction of the object's motion

• towards the center of the circle

• towards the outside of the circle

A rope attaches a tire to an overhanging tree limb. A girl swinging on the tire has a centripetal acceleration of 3.0 m/s^2. If the length of the rope is 2.1 m, what is the girl’s tangential speed?

• 3.5 m/s

• 2.5 m/s

• 8.5 m/s

• 12.5 m/s

Tags

NGSS.MS-PS3-1

Which statement is true the image if A and B are on a spinning wheel?

• A has a greater tangential speed because it is closer to the center.

• B has a greater tangential speed because it is closer to the center.

• A has a greater tangential speed because it is further from the center.

• B has a greater tangential speed because it is further from the center.

A racecar moving along a circular track has a centripetal acceleration of 15.4 m/s².If the car has a tangential speed of 30.0 m/s, what is the distance between the car and the center of the track?

• 33.7 m
• 88.6 m
• 44.2 m
• 58.4 m

How is it that a non-zero acceleration occurs if an object is moving in a circular path with CONSTANT SPEED?

• Velocity increases as the object travels in a circle.

• Velocity decreases as the object travels in a circle.

• The object's Velocity changes direction as it travels in a circle.

• There actually is no acceleration as an object travels in a circle.

Tags

NGSS.HS-PS2-1

What is the best definition of acceleration?

• When an object changes direction

• When an object's velocity slows down

• When an object speeds up

• When an object changes velocity(speed and direction).

A dog sits 1.5 m from the center of a merry-go-round. The merry-go-round is set in motion, and the dog’s tangential speed is 1.5 m/s. What is the magnitude of the dog’s centripetal acceleration?

• 3.9 m/s^2
• 2.8 m/s^2
• 1.5 m/s^2
• 11.5 m/s^2