A barbell consists of two massive balls connected by a low-mass rod. The barbell slides across a low-friction icy surface, spinning as it moves, as shown in the diagram. The mass m of each ball is 0.8 kg. The distance d between the centers of the balls is 0.37 m. The speed v of the center of mass...

a) What is the tangential acceleration of a bug on the rim of a 16 in diameter disk if the disk accelerates uniformly from rest to an angular speed of 78 revolutions per minute in 3.4 s?

Two charges, -2.9 \mu C and -5.8 \mu C, are located at (-0.45 m, 0) and (0.45 m, 0), respectively. There is a point on the x-axis between the two charges where the electric field is zero. Find the location of the point where the electric field is zero.

An emf is induced in a conducting loop of wire 1.12 {\rm m} long as its shape is changed from square to circular. Find the average magnitude of the induced emf if the change in shape occurs in 4.24 {\rm s} and the local 0.120-{\rm T} magnetic field is perpendicular to the plane of the loop.

in the position shown collar B moves to the left with constant velocity of 300 mm/s. determine the velocity of collar A, the velocity of portion c of the cable and the relative velocity of portion c with respect to collar b

A sports car of mass 1250 (including the driver) crosses the rounded top of a hill ( = 91 ) at 25 . Determine the normal force exerted by the road on the car.

A ceiling fan with 80-cm-diameter blades is turning at 61 rpm. Suppose the fan coasts to a stop 25s after being turned off. a.) What is the speed of the trip of a blade 10 s after the fan is turned off? b.) Through how many revolutions does the fan turn while stopping?

An athlete at the gym holds a 3.5 kg steel ball in his hand. His arm is 70 cm long and has a mass of 4.0 kg. What is the magnitude of the torque about his shoulder if he holds his arm straight out to his side, parallel to the floor?

A car travels at a speed of 23 m/s around a curve of radius 31 m. (gravity: 9.8) a. What is the net centripetal force needed to keep the car from skidding sideways? b. Were there no friction between the car's tires and the road, what centripetal force could be provided just by the banking...

For the circuit shown in the figure, find the potential difference between points a and b. Each resistor has R = 130 \Omega and each battery is 1.5 {\rm V}.