Uniform Circular Motion
Dynamics of Circular Motion
Vocabulary and More
Gravitation
Gravitation &
Satellites
Satellites
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 m3/Kgs2
100
True or False: If you went to another planet, your weight would be the same as your weight on Earth
False
100
As a rocket moves away from the Earth's surface, the rocket's weight
decreases
200
Why does an object accelerate while maintaining constant speed?
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
70N
200
What happens to the force of gravitational attraction between two small objects if the distance between their centers is halved?
4X
300
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
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
Any object (natural or artificial) in orbit around a planet or star.
Satellite
300
The gravitational force between two objects is F if masses of both the objects are halved without altering the distance between them, what is the new force?
1/4F
300
The equation for orbital velocity around earth
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?
1/4 Fc
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 in terms of M, r, and constants?
400
Is the reason an object in uniform circular motion fly's off in a straight line.
Inertia
400
When the mass of an object is doubled, its acceleration due to gravity would be
Unchanged
400
A satellite A has twice the mass of satellite B. The satellites orbit a planet with the same orbital radius. The orbital velocity of the satellite A compared to B is:
A. Twice greater C. The same
B. Four times greater D. Half as much
The same
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
Jupiter has a mass that is roughly 320 times that of the Earth and a radius equal to 11 times that of the Earth. What is the acceleration due to gravity on the surface of Jupiter?
26.4m/s2
500
A satellite is orbiting a planet with an orbital radius r. Draw and label the direction of the velocity and acceleration of the satellite at the position shown
