Physics Physics Practice Problems Solutions Library

Circular Motion Solutions Library

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41 solutions

Circular Motion

Q. The planetary model of the atom pictures electrons orbiting the atomic nucleus much as planets orbit the Sun. In this model you can view hydrogen, ...

Solved • Jul 20, 2020

Circular Motion

Q. The radius of the earth's very nearly circular orbit around the sun is 1.5x1011m.A. Find the magnitude of the earth's velocity as it travels around...

Solved • Jul 17, 2020

Circular Motion

Q. A rotating platform of radius R = 4.5 cm starts from rest and accelerates with uniform angular acceleration α = 42 rad/s. Part (a) Write an express...

Solved • Jul 15, 2020

Circular Motion

Q. True or False: A particle traveling around a circle at constant speed will experience an acceleration.

Solved • Jul 15, 2020

Circular Motion

Q. A spot of paint on a bicycle tire moves in a circular path of radius 0.33 m.  When the spot has traveled a linear distance of 1.76 m, through what ...

Solved • Jul 1, 2020

Circular Motion

Q. The net force exerted on a car traveling in a circular path at constant speed isA) directed toward the center of the curve. B) zero because the car...

Solved • Jun 2, 2020

Circular Motion

Q. A ball on a string moves in a vertical circle, as shown. When the ball is at its lowest point, is the tension in the string greater than, less than...

Solved • Jun 2, 2020

Circular Motion

Q. The angular velocity (in rpm) of the blade of a blender is given in the figure.a. If θ=0rad at t=0s, what is the blade's angular position at t=20s?...

Solved • Jun 2, 2020

Circular Motion

Q. As you finish listening to your favorite compact disc (CD), the CD in the player slows down to a stop. Assume that the CD spins down with a constan...

Solved • May 21, 2020

Circular Motion

Q. A gyroscope slows from an initial rate of 32.0 rad/s at a rate of 0.700 rad/s2.(a) How long does it take to come to rest?(b) How many revolutions d...

Solved • May 21, 2020

Circular Motion

Q. A rotating space station is said to create "artificial gravity" - a loosely-defined term used for an acceleration that would be crudely similar to ...

Solved • May 19, 2020

Circular Motion

Q. Suppose a piece of dust rests on a CD. The variables to use for the problem are as follows: f = 420 rpm r = 4.1cm t = 2.8min a) If the spin rate of...

Solved • May 19, 2020

Circular Motion

Q. A ball is launched up a semicircular chute in such a way that at the top of the chute, just before it goes into free-fall, the ball has a centripet...

Solved • May 11, 2020

Circular Motion

Q. A car drives over the top of a hill that has a radius of 50 m. What maximum speed can the car have without flying off the road at the top of the hill?

Solved • May 7, 2020

Circular Motion

Q. Figure 1 shows four rotating wheels. For each, determine the signs (+ or -)of ω and α.

Solved • May 6, 2020

Circular Motion

Q. If an object travels at a constant speed in a circular path, the acceleration of the object is:1- larger in magnitude the smaller the radius of the...

Solved • May 5, 2020

Circular Motion

Q. Which is true for a car moving around a circular track with constant speed? (Check all that apply)1. It has zero acceleration2. it has an accelerat...

Solved • May 5, 2020

Circular Motion

Q. A big dog has a torso that is approximately circular, with a radius of 16cm. At the midpoint of a shake, the dog's fur is moving at a remarkable 2....

Solved • May 4, 2020

Circular Motion

Q. The passengers in a roller coaster car feel 50% heavier than their true weight as the car goes through a dip with a 30.0 m radius of curvature.What...

Solved • Apr 28, 2020

Circular Motion

Q. A heavy flywheel is accelerated (rotationally) by a motor that provides constant torque and therefore a constant angular acceleration . The flywhee...

Solved • Apr 28, 2020

Circular Motion

Q. A bobsled turn banked at 78° is taken at 24.65 m/s.a. What is the radius of the bobsled turn in n, assuming it is ideally banked and there is no fr...

Solved • Apr 28, 2020

Circular Motion

Q. Adjusting the test-mass riser along the platform changes the radius of the circular path. True or false?

Solved • Apr 27, 2020

Circular Motion

Q. The Nardo ring is a circular test track for cars. It has a circumference of 12.5km. Cars travel around the track at a constant speed of 100km/h. A ...

Solved • Apr 24, 2020

Circular Motion

Q. Gibbons, small Asian apes, move by brachiation, swinging below a handhold to move forward to the next handhold. A 9.0 kg gibbon has an arm length (...

Solved • Apr 23, 2020

Circular Motion

Q. An ice skater is spinning with her arms extended out at her sides. She folds in her arms. Explain what happens to her total kinetic energy, moment ...

Solved • Apr 22, 2020

Circular Motion

Q. A roller coaster car crosses the top of a circular loop-the-loop at twice the critical speed.What is the ratio of the normal force to the gravitati...

Solved • Apr 21, 2020

Circular Motion

Q. A cyclist competes in a one-lap race around a flat, circular course of radius 140m. Starting from rest and speeding up at a constant rate throughou...

Solved • Apr 21, 2020

Circular Motion

Q. A penny is placed a distance r from the center of a record spinning at ω = 90π rad/min. The coefficient of static friction between the penny and th...

Solved • Apr 21, 2020

Circular Motion

Q. Six artificial satellites complete one circular orbit around a space station in the same amount of time. Each satellite has mass m and radius of or...

Solved • Apr 10, 2020

Circular Motion

Q. Four children are playing in a field. The children form a line, holding hands. The player at the front of the line starts to spin around faster and...

Solved • Apr 8, 2020

Circular Motion

Q. An object is in a uniform circular motion. Which of the following statements must be true?A) The net force acting on the object is zero.B) The velo...

Solved • Apr 6, 2017

Circular Motion

Q. It is common to see birds of prey rising upward on thermals. The path they take may be spiral-like. You can model the spiral motion as uniform circ...

Solved • Jan 19, 2017

Circular Motion

Q. You are taking a turn at 30.0 m/s on a ramp of radius 25.0 m. What is your acceleration? A) 20.8 m/s2 B) 0.833 m/s2 C) 1.20 m/s2 D) 36.0 m/s2

Solved • Jan 18, 2017

Circular Motion

Q. If the acceleration of an object is always directed perpendicular to its velocity,A) the object is slowing down.B) the object is speeding up.C) thi...

Solved • Jan 18, 2017

Circular Motion

Q. Shown here are the velocity and acceleration vectors for an object in several different types of motion. In which case is the object's velocity cha...

Solved • Jan 18, 2017

Circular Motion

Q. Which of the following is an accurate statement?A) All points on a rotating disk experience the same radial acceleration.B) The vector sum of the t...

Solved • Jan 18, 2017

Circular Motion

Q. An object is moving with a constant speed of 11 m/s and an acceleration of 2.6 m/s2. Which statement is true?A) Impossible. With acceleration, the ...

Solved • Jan 16, 2017

Circular Motion

Q. An object is moving with a constant speed of 18 m/s and an acceleration of 4.7 m/s2. Which statement is true? A) This could be a leaf falling from...

Solved • Jan 13, 2017

Circular Motion

Q. You spin in a circle with a ball attached to the end of a 1 m string. If the maximum centripetal acceleration the string can withstand is 15 m/s2, ...

Solved • Jan 6, 2017

Circular Motion

Q. In a game of tetherball, the ball is hit such that it spins around the pole at 500 rpm, spinning with a 0.5 m orbit. What is the centripetal accele...

Solved • Jan 5, 2017

Circular Motion

Q. A jogger is running around a circular track. If the jogger is averaging a mile every 10 minutes, and a single lap of the track is a quarter mile, w...

Solved • Jan 5, 2017