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A string is wrapped around a pulley with a radius of 2.0cm. The pulley is initally at rest. A constant force of 50N is applied to the string, causing the pulley to rotate and the string to unwind. The string unwinds 1.2m in 4.9 seconds.
Find the angular acceleration at which the string unwinds.
What is the moment of inertia of the pulley.
q1. 16.8-kg sled is being pulled across a horizontal surface at a constant velocity. the pulling force has a magnitude
Two charges are fixed on the x axis: one with a charge of = 5.00 at = -1.00 and the other with a charge of = 3.00 at = 1.50 . Find the force exerted on a charge = -5.00 placed at the origin (x=0). What are the magnitudes of the three charges q, q1..
A nail gun fires a nail into a piece of wood. The nail is going a velocity of 9.0 m/s right before entering the wood. From entering the wood, how long does it take the nail to come to a stop
The gauge pressure in a helium gas cylinder is initially 26atm. What fraction of the original gas remains in the cylinder
A square loop of wire has sides of length 3 cm. A magnetic field points out of the screen; its magnitude is B = 3.0t2y, What is the emf around the square at t = 2.00 s
The image behind a convex mirror (radius of curvature = 74 cm) is located 22 cm behind the mirror. What is the magnification of the mirror?
The minimum stopping distance for a car travelling at a speed of 30 {rm m/s} is 60 {rm m}, including the distance travelled during the driver's reaction time of 0.54 {rm s}.
A woman on a bridge 104 m high sees a raft floating at a constant speed on the river below, She drops a stone from rest in an attempt to hit the raft, Find the speed of the raft
A person has a near point of NP = 85 cm and a far point of FP = 210 cm. Write a formula for the power, P1, of the upper portion of the bifocals, in terms of the given quantities, that will enable the person to see distant objects clearly
A spherical shell of radius R = 8.0 cm has a total charge Q = - 900nC uniformly distributed on its surface, Write the net electric field at the point P in unit vector notation
There is a long smooth slope and we release balls from the top of it every 1.5 s. Suppose the acceleration of the ball is 4.8 m/s2 and every ball is numbered in the releasing order.
q1. an automobile with a mass of 1340 kg has 3.00 m between the front and rear axles. its center of gravity is located
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