2Question 1An object is in uniform circular motion. Which of the following statements is true?A) Velocity = constantB) Speed = constantC) Acceleration = constant
3Question 2A CD makes one complete revolution every tenth of a second. The angular velocity of point 4 is:A) the same as for pt 1.B) twice that of pt 2.C) half that of pt 2.D) 1/4 that of pt 1.E) four times that of pt 1.
4Question 3A CD makes one complete revolution every tenth of a second. Which has the largest linear (tangential) velocity?A) point 1B) point 2C) point 3D) point 4
5Question 4A spider is sitting on a turntable that is rotating at 33 rpm. The acceleration a of the spider isA) greater the closer the spider is to the central axis.B) greater the farther the spider is from the central axis.C) nonzero and independent of his location.D) zero.
6Question 5A boy swings on a tire swing. When is the tension in the rope the greatest?A) At the highest point of the swing.B) Midway between his highest and lowest points.C) At the lowest point in the swing.D) It is constant.
7Question 6A centrifuge is spinning up with a constant tangential acceleration. The radial accelerationA) is independent of the tangential acceleration.B) increases.C) decreases.
8Question 7A ball on a string is being swung around in a circle with a constant radial acceleration. The tangential accelerationA) is independent of the radial acceleration.B) increases.C) decreases.
9Question 8A car is going around a banked curve at a high rate of speed. For the car not to skid, inwhich direction does the frictional force act?A) Up the plane.B) Down the plane.C) Directly towards the center of the curve.
10Question 9Mimas orbits Saturn at a distance D. Enceladus orbits Saturn at a distance 4D. What is the ratio of the periods of their orbits?A) TM/TE = 1/8B) TM/TE = 1/4C) TM/TE = 1/2D) TM/TE = 2
11Question 10Jill swings on a vine 5m long. What is the tension in the vine if Jill, mass 60 kg, is moving at 2.5 m/s when the vine is vertical?A) 514 NB) 589 NC) 664 ND) 75 N
12Question 11A car goes over a bump of radius 35m. If the driver's mass is 67 kg, what is the speed thecar must be going in order for the driver to feel "weightless"?A) 24 m/sB) 19 m/sC) 13 m/sD) 6 m/s
13Question 12A plane is flying in a vertical circle of radius 210 m. If the pilot's mass is 67 kg, what is the speed the plane must have in order for the pilot to experience a force of "2 G's" at the bottom of the circle?A) 45 m/sB) 2100 m/sC) 21 m/sD) 4.6 m/s
14Question 13As you make a right-hand turn in your car, you are pushed against the door to your left.This is becauseA) the centrifugal force pushed you to the left.B) no force pushed you to the right.
15Question 14A ball is rolling around a curved horizontal track. Which of the paths represents the path of the ball when it leaves the track?A)B)C)
16Question 15The figure below shows a wheel rolling along a level surface without slipping. Which point on the wheel has the greatest velocity?A) point AB) point BC) point CD) they all have thesame velocity.AwBvC
17Question 16A child runs around the circular ledge of a fountain which has a diameter of 6.5 m. After the child has run 9.8 m, her angular displacement isA) 0.48 rad.B) 6.0 rad.C) 1.5 rad.D) 3.0 rad.
18Question 17A child runs around the circular ledge of a fountain which has a diameter of 6.5 m. If ittakes her 72 seconds to run all the way around, her angular velocity isA) rad/sB) 0.57 m/sC) 0.17 rad/sD) rad/s
19Question 18In Olympic bobsled races, the sleds travel down the mountain at speeds up to 90 mph in ice coated tracks, navigating several sharp turns. If the bobsled is going too fast around a turn, itA) travels up the wall on the outside of the turn.B) remains in the middle of the track.C) travels up the wall on the inside of the turn.
20Question 19A properly banked curve tilts _________ the center of the turn to increase _________ .A) towards, the force of kinetic friction.B) towards, the normal force.C) away from, the normal force.D) away from, the force of static friction.
21Question 20Satellite A and satellite B are orbiting the earth. Satellite B is four times as far away assatellite A. Compare the linear speeds of the two satellites.A) vA = 4vBB) vA = 2vBC) vA = ½ vBD) vA = ¼vB