1. A 5.40 g coin is placed 17.0 cm from the center of a turntable. The...

1. A 5.40 g coin is placed 17.0 cm from the center of a turntable. The coin has static and kinetic coefficients of friction with the turntable surface of μs = 0.810 and μk = 0.460.

Part A: What is the maximum angular velocity with which the turntable can spin without the coin sliding? Express your answer with the appropriate units.

2. A 800 g ball moves in a vertical circle on a 1.09 m -long string. If the speed at the top is 4.30 m/s , then the speed at the bottom will be 7.82 m/s .

Part A: What is the ball's weight? Express your answer with the appropriate units.

Part B: What is the tension in the string when the ball is at the top? Express your answer with the appropriate units.

Part C: What is the tension in the string when the ball is at the bottom? Express your answer with the appropriate units.

Expert Solution

genius_generous answered 1 year ago

A coin is placed on a flat turntable, a distance 18.6 cm from the center of...

A coin is placed on a flat turntable, a distance 18.6 cm from the center of rotation. The coefficient of static friction between the turntable and the coin is 0.8. At what maximum angular speed may the turntable be rotating before the force of friction is not able to keep the coin at the same distance from the axis? Hint: if you think a critical piece of information is missing, assign it a letter, and see if it cancels in...

A coin is placed 18.0 cm from the axis of a rotating turntable of variable speed....

A coin is placed 18.0 cm from the axis of a rotating turntable of variable speed. When the speed of the turntable is slowly increased, the coin remains fixed on the turntable until a rate of 35.0 rp (revolutions per minute) is reached, at which point the coin slides off. Part A- What is the coefficient of static friction between the coin and the turntable? Express your answer using three significant figures.

A peanut sits 8.0 cm away from the center of a turntable that is spinning at...

A peanut sits 8.0 cm away from the center of a turntable that is spinning at a rate of 200 rad/s. If it takes 15.0 s from the turntable to come to a stop at a constant rate, what is the direction relative to the vertical of the force exerted on the peanut by the turntable 14.7 s after the turntable has begun slowing down? With a diagram if possible.

A +15.00 nC point charge with a mass of 4.00 g is placed 25.0 cm from...

A +15.00 nC point charge with a mass of 4.00 g is placed 25.0 cm from the surface of a solid conducting sphere having a radius of 125 cm and a net charge of +2.00 μC.If the point charge is released, it will be repelled by the conducting sphere. Given that the point charge was initially at rest, what will be its speed when it is 75.0 cm from the surface of the sphere?

1) A meter stick is placed in a support stand and balanced at its center of gravity. A 50 gram mass is placed at the 25.00 cm mark.

1) A meter stick is placed in a support stand and balanced at its center of gravity. A 50 gram mass is placed at the 25.00 cm mark. An unknown mass is placed on the other side of the meter stick and moved until the entire system is balanced. If the unknown mass is placed at the 75.00 cm mark, then what is the value of the unknown mass? Ignore the mass of the knife-edge clamps and assume that...

A 1.5 kg , 20-cm-diameter turntable rotates at 50 rpm on frictionless bearings. Two 470 g...

A 1.5 kg , 20-cm-diameter turntable rotates at 50 rpm on frictionless bearings. Two 470 g blocks fall from above, hit the turntable simultaneously at opposite ends of a diameter, and stick. Part A What is the turntable's angular velocity, in rpm, just after this event? Express your answer to two significant figures and include the appropriate units. w=?

A 1.8 kg , 20-cm-diameter turntable rotates at 130 rpm on frictionless bearings. Two 510 g...

A 1.8 kg , 20-cm-diameter turntable rotates at 130 rpm on frictionless bearings. Two 510 g blocks fall from above, hit the turntable simultaneously at opposite ends of a diameter, and stick.What is the turntable's angular velocity, in rpm, just after this event?

An object 2.87 cm high is placed 19.9 cm from a convex mirror with a focal...

An object 2.87 cm high is placed 19.9 cm from a convex mirror with a focal length of 7.70 cm. (a) Find the position of the image. Your response differs from the correct answer by more than 100%. cm (b) Find the magnification of the mirror. (c) Find the height of the image. Your response differs from the correct answer by more than 100%. cm Suppose the object is moved so it is 3.85 cm from the same mirror. Repeat...

a 4.2 g coin sliding to the right at 21.4 cm/s makes an elastic head-on collision...

a 4.2 g coin sliding to the right at 21.4 cm/s makes an elastic head-on collision with a 12.6g coin that is initially at rest. after the collision, the 4.2g coin moves to the left at 10.7cm/s. a. find the final velocity of the other coin in cm/s b. find the amount of kinetic energy transferred to the 12.6g coin

A fulcrum is placed at the 55 cm position of a 100 cm (1 meter) stick...

A fulcrum is placed at the 55 cm position of a 100 cm (1 meter) stick with a mass of 18 kg. a 10 kg mass is placed at 70 cm position. where must a 5 kg mass be placed so that the net torque is zero? (assume the mass of the meter stick is uniformly distributed)

Question