1. When a student stands on a rotating table, the frictional force exerted on the student by the table is a.greater in magnitude than the frictional force exerted on the table by the student b. less in magnitude than the frictional force exerted on the table by the student c. equal in magnitude than the frictional force exerted on the table by the student d. directed away from the center of the table 2. A child whirls a ball at the end of a rope, in a uniform circular motion. Which of the following statements is NOT true? a. speed of the ball is constant b. radius is constant c. velocity of the ball is constant d. magnitude if the ball's acceleration is constant 3.A centripetal force F is applied to an eraser moving at a constant speed v in a horizontal circle of radius r. if the radius quadrupled and the speed is doubled, what happened to the centripetal force? a. increased by a factor of 2 b. decreased by a factor of 2 c.doesn't change d. Increased by a factor of square of 2
1. When a student stands on a rotating table, the frictional force exerted on the student by the table is a.greater in magnitude than the frictional force exerted on the table by the student b. less in magnitude than the frictional force exerted on the table by the student c. equal in magnitude than the frictional force exerted on the table by the student d. directed away from the center of the table 2. A child whirls a ball at the end of a rope, in a uniform circular motion. Which of the following statements is NOT true? a. speed of the ball is constant b. radius is constant c. velocity of the ball is constant d. magnitude if the ball's acceleration is constant 3.A centripetal force F is applied to an eraser moving at a constant speed v in a horizontal circle of radius r. if the radius quadrupled and the speed is doubled, what happened to the centripetal force? a. increased by a factor of 2 b. decreased by a factor of 2 c.doesn't change d. Increased by a factor of square of 2
1. When a student stands on a rotating table, the frictional force exerted on the student by the table is a.greater in magnitude than the frictional force exerted on the table by the student b. less in magnitude than the frictional force exerted on the table by the student c. equal in magnitude than the frictional force exerted on the table by the student d. directed away from the center of the table 2. A child whirls a ball at the end of a rope, in a uniform circular motion. Which of the following statements is NOT true? a. speed of the ball is constant b. radius is constant c. velocity of the ball is constant d. magnitude if the ball's acceleration is constant 3.A centripetal force F is applied to an eraser moving at a constant speed v in a horizontal circle of radius r. if the radius quadrupled and the speed is doubled, what happened to the centripetal force? a. increased by a factor of 2 b. decreased by a factor of 2 c.doesn't change d. Increased by a factor of square of 2
1. When a student stands on a rotating table, the frictional force
exerted on the student by the table is
a.greater in magnitude than the frictional force exerted on the
table by the student
b. less in magnitude than the frictional force exerted on the
table by the student
c. equal in magnitude than the frictional force exerted on the
table by the student
d. directed away from the center of the table
2. A child whirls a ball at the end of a rope, in a uniform circular
motion. Which of the following statements is NOT true?
a. speed of the ball is constant
b. radius is constant
c. velocity of the ball is constant
d. magnitude if the ball's acceleration is constant
3.A centripetal force F is applied to an eraser moving at a constant
speed v in a horizontal circle of radius r. if the radius quadrupled
and the speed is doubled, what happened to the centripetal force?
a. increased by a factor of 2
b. decreased by a factor of 2
c.doesn't change
d. Increased by a factor of square of 2
4. A centripetal force F is applied to an eraser moving at a constant
speed vin a horizontal circle of radius r. if the force is applied, but
the radius is halved, what happened to the centripetal force?
a. increased by a factor of 2
b. decreased by a factor of 2
c. doesn't change
d. Increased by factore of square of 2
5. Five equal forces of 10 N are applied at a point. If the angle
between them is equal, what is the resultant force?
a. 10 N
c. 20 N
b. 14.14 N
d. 0
Definition Definition Force on a body along the radial direction. Centripetal force is responsible for the circular motion of a body. The magnitude of centripetal force is given by F C = m v 2 r m = mass of the body in the circular motion v = tangential velocity of the body r = radius of the circular path
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