UCM

What is the centripetal acceleration upon a car negotiating an unbanked curve with a radius of 40.0 m if it travels at a speed of 10 m/s? (type just the number)

Tags

NGSS.HS-PS2-1

In uniform circular motion, the net force acting on the moving object acts towards the ________ of the circle

In uniform circular motion, the tangential velocity of the moving object is ______

If you spin a ball attached to a string fast enough in a horizontal circle, at the highest point the ball does not fly off because of...

• The force of friction acting on the ball

  centripetally

• The force of tension acting on the ball centripetally

• The force of gravity acting on the ball

  centripetally

• The force of normal force acting on the ball

  centripetally

Tags

NGSS.MS-PS2-2

Which letter represents amplitude? (a)  

• A

• B

• C

• D

• E

Tags

NGSS.MS-PS4-1

When a car, traveling over a circular hill, is just barely not going airborn, the force of gravity on the car is equal to:

• v²/r

• mv²/r

• GM₁*m₂/r²

• F_N

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

A mass is held at the end of a rope, which is attached to a fixed point.  This mass is held horizontally from the fixed point and allowed to drop, making an arc pattern as it falls.  When the mass is right below the fixed point, it has a speed of v.  What is the tension on the rope at this point?

(Hint, remember Fc is the net force acting centripetally)

• mg

• mv²/r

• mg - mv²/r

• mg + mv²/r

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

A car goes around an unbanked (flat) horizontal circle of radius r at a constant tangential velocity v.  What is the magnitude of the force of gravity’s contribution to the centripetal force this car experiences?

• 0

• 1/2at²

• mv²/r

• mg

Tags

NGSS.MS-PS2-4

If you swing a bucket of water fast enough in a vertical circle, at the highest point the water does not spill out because of...

• The inertia of the water in the bucket

• The centripetal force acting on the water

• The force of gravity acting on the bucket

• An outward force equal to the centripetal force.

Tags

NGSS.MS-PS2-4

A real daredevil wants to experience as much acceleration as possible while riding a merry go round - where should she sit?

• Towards the center of the ride

• Towards the edge of the ride

• All points will experience the same acceleration

• No points on the ride will experience acceleration because it moves at a constant speed