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Two rods AB and BC have charges +2Q and -2Q uniformly distributed on them. They are bent in the shape of arcs of a circle and joined at B.
1. Find the linear charge density on rod AB.
2. Find the electric field at the midpoint between A and C.
3. Now a small object of mass M and electric charge 3Q is placed at the mid point between A and C. If it is free to move, find the acceleration (magnitude and direction) of this small mass.
As a baseball is being caught, its speed goes from 31 to 0 m/s in 0.005 seconds. The mass of the baseball is 0.145 kg. What is the force acting on the ball
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The magnetic field inside an air filled solenoid 36cm long and 2cm in diameter is 0.8T. Approximately how much energy is stored in this field
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Basketball player Darrell Griffith is on record as attaining a standing vertical jump of 1.2 m. What is his speed as he leaves the floor
A solenoid of cross sectional area 1.4 m2 and 2.0 m long carries a current of 4.0 A. It stores an energy of 3.4 J. How many turns per unit length are in this solenoid
An aircraft weighing 819 N is accelerated at 11.7 m/s2 for 5 seconds, at which time the aircraft launches. What is the force required to launch the aircraft
An electric field E with an average magnitude of about 150 N/C points downward in the atmosphere near Earth's surface. What charge (both sign and magnitude) must be used
A 497-turn solenoid has a radius of 8.75 mm and an overall length of 12.4 cm. If the solenoid is connected in series with a 2.50-? resistor and a battery, what is the time constant of the circuit
A 1590 kg roller coaster car starts from rest at a height H = 20.0 m above the bottom of a 15.0 m diameter loop. determine the downward force of the rails on the car
A cockroach of mass m lies on the rim of a uniform disk of mass 7.00 m that can rotate freely about its center like the merry-go-round. At first the cockroach and disk rotate together with an angular velocity of 0.220 rad/s. Then the cockroach walks ..
A woman on a bridge 86.8 m above a stream sees a bottle floating along at a constant speed. Calculate the speed of the bottle
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