Uniform Circular Motion
Dynamics of Circular Motion
Vocabulary and More
Gravitation
Random UCM ??
100
When an object moves in uniform circular motion, the direction of its acceleration is __.
Directed towards the center of the circular path.
(centripetal)
100
A car goes around a circular curve on a horizontal road at constant speed. What is the direction of the friction force on the car due to the road?
Directed to the center of the circular path that the car is on.
100
Value of the Universal Gravitational Constant
6.667 x 10^-11 m^3/Kgs^2
100
True or False: If you went to another planet, your weight would be the same as your weight on Earth
False
100
The part of velocity that changes in uniform circular motion
Direction
200
The ability to accelerate while maintaining constant velocity
changing direction
200
When a car goes around a circular curve on a horizontal road at constant speed, what force causes it to follow the circular path?
The friction force from the road on the car.
200
The time it takes for an object to complete one trip around a circular path
Period
200
The value you exert on the earth if it does 70N of force on you
What is 70N
200
The place a passenger feels the heaviest in a Ferris Wheel and their weight is found by combining Fg and Fc at what point
The bottom
300
What is the centripetal force exerted on a 1.5 kg object that is spinning at 250 rev/min? The object is .15 m from the axis of rotation of a centrifuge.
~154 N.
300
A 6.0 kg stone is swung in a vertical circle of radius 2.0 m. What is the minimum speed of the stone at the top of the circle?
4.4 m/s
300
Is the reason an object in uniform circular motion fly's off in a straight line.
Following its inertia
300
The gravitational force between two objects is F if masses of both the objects are halved without altering the distance between them
1/4
300
The equation for orbital velocity around earth
v = sqrt(Gme / r)
400
A car goes around a curve of radius r at a constant speed v. Then it goes around the same curve at half of the original speed. What is the centripetal force on the car as it goes around the curve for the second time, compared to the first time?
400
A roller coaster car (mass = M) is on a track that forms a circular loop (radius = r) in the vertical plane. If the car is to just maintain contact with the track at the top of the loop, what is the minimum value for its speed at that point?
400
The vector version of speed for Uniform circular motion
Tangential Velocity
400
When the mass of an object is doubled, its acceleration due to gravity would be
Unchanged
400
The velocity of a car with a centripetal acceleration of 4m/s2 moving at a radius of 9m
6 m/s
500
A 2.0-kg ball is moving with a constant speed of 5.0 m/s in a horizontal circle whose diameter is 1.0 m. What is the magnitude of the net force on the ball?
100 N
500
The coefficient of friction for a .90 kg stone on a turntable is .24 . The stone is located .25 m from the center of the turntable. What is the maximum speed with which the stone can travel along its circular path before it slides off the turntable?
.77 m/s
500
The sum of the forces causing an object to move in uniform circular motion
Centripetal force
500
The centripetal acceleration of a 4.0x102-kilogram satellite is in a circular orbit at an altitude of 5.0x 106 meters. The orbital speed of the satellite is 6.0x103 meters per second and the radius of the Earth, R, is 6.4x106 meters.
What is 3.2 m/s2?
500
A roller coaster car is on a track that forms a circular loop in the vertical plane. If the car is to just maintain contact with track at the top of the loop, what is the minimum value for its centripetal acceleration at this point?
