6290

Physics Circular Motion Level: Misc Level

A 200 g object is moving in a circle of radius 4.0 m at a uniform speed of 6.0 m/s. The net force acting on the object is:

a. 1.8 N away from the center of the circle.

b.1.8 N towards the center of the cirle.

c.3.6 N towards the center of the cirle.

d.3.6 N tangential to the cirle.

6211

Physics Circular Motion Level: Misc Level

An angular acceleration of 1200 rev/min2 when expressd in radians2 is:

6142

Physics Circular Motion Level: Misc Level

A wheel has eight equally spaced spokes and a radius of 34 cm. It is mounted on a fixed axle and is spinning at 1.4 rev/s. You want to shoot a 21-cm-long arrow parallel to this axle and through the wheel without hitting any of the spokes. Assume that the arrow and the spokes are very thin. What minimum speed must the arrow have?

6089

Physics Circular Motion Level: Misc Level

The uniform 12-ft pole is hinged to the truck bed and released from the vertical position as the truck starts from rest with an acceleration of 3.8 ft/s/s. If the acceleration remains constant during the motion of the pole, calculate the angular velocity of the poleas it reaches the horizontal position .Assume g=32.2 ft/s/s. Give your answer in inverse seconds

6045

Physics Circular Motion Level: Misc Level

Calculate the speed and acceleration on a point of a 15 3/4 vinyl record that has a diameter of 50.0 cm. (Note: 15 3/4 is the frequency that the record turns in RPM)

6034

Physics Circular Motion Level: Misc Level

A tire swing has a length of 1.35 m and has a person on it with weight of 659 N. If that swing is pulled back to a 45 degree, angle, what will the speed of the person be

a) when they get to the other side of their swing.

b) when they are the right at the bottom of their swing?

5996

Physics Circular Motion Level: Misc Level

Answer the following question (s), showing your calculations.A runner moving at a speed of 5.3 m/s rounds a curved track with a 79 -m radius .What is the runner,s centripetal acceleration?

5940

Physics Circular Motion Level: Misc Level

An angular acceleration of 1200 rev/min2 when expressed in radians/s2 is ?

5895

Physics Circular Motion Level: Misc Level

A space station,in the form of a wheel 120 m in diameter, rotates to provide an artificial gravity"of 3.00 m/s2 for persons who walk around on the inner wall of the outer rim.Find the rate of rotation of the wheel (in revolutions per minute)that will produce this effect.

5879

Physics Circular Motion Level: Misc Level

A person with a ponytail 25 cm long, is using a lathe which is turning at 300 rpm. The person turns their head, catching the end of the ponytail in the workpiece, which has a diameter of 7 cm. How long will it take the person,s head to be dragged into the lathe?

5309

Physics Circular Motion Level: Misc Level

An object is moving in a circular path of radius 1 m with a uniform speed of 1.0 x 106 m/s. The acceleration of the object has a magnitude of:

(a) 1.0 x 10 3 m/s2

(b) 0

(c) 1.0 x106 m/s2

(d) 1.0 x10 12 m/s2

5098

Physics Circular Motion Level: Misc Level

A soccer ball whose radius is 11 cm rolls a distance of 10 m in 3.50 s. What is the angular speed of the ball?

a. 13 m/s

b. 26 m/s

c. 39 m/s

d. 52 m/s

5097

Physics Circular Motion Level: Misc Level

A child is riding a merry- round which completes one revolution every 8.36 s. The child is standing 4.65 m from the center of the merry -go round. What is the tangential speed of the child?

a. 5.64 m/s

b. 3.49 m/s

c. 0.556 m/s

d. 1.80 m/s

5096

Physics Circular Motion Level: Misc Level

A wheel rotates through an angle of 13.8 rad as it slows down from 22.0 rad/s to 13.5 rad/s. What is the magnitude of the average angular acceleration of the wheel?

5095

Physics Circular Motion Level: Misc Level

A wheel that is rotating at 33.3 rad/s is given an angular acceleration of 2.15 rad/s to power of (exponent). Through what angle has the wheel turned when its angular speed reaches 72.0 rad/s?