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A ball attached to a string is twirled in a circle of radius 1.25 m. If the constant speed of the ball is 2.25 m/s, what is the period of the circular motion?
A 2 kg block is pulled by the rope on the horizontal surface by a 3N force. The coefficient of the static friction (?s) equals 0.3. Calculate the force of static friction acting on the block
Two people, A and B, with masses of 50-kg and 60-kg, correspondingly, stand on a frictionless surface 10m apart. B pulls on a connecting rope, giving A an acceleration of 0.92m/s2 towards B. a) what is B's acceleration toward A.
In a bicycle race, the leader is travelling with a constant velocity of 11.10 m/s and is 10.0 m ahead of the second-place cyclist. The second place cyclist has a velocity of 9.50 m/s and an acceleration of 1.20 m/s squared. How much time elapses b..
A space traveler weighs 535 N on earth. What would the traveler weigh on another planet whose radius is three times that of earth and whose mass is twice that of earth.
A boat can travel 2.20 m/s in still water. What will be the position of the boat, relative to its point of origin, after 3.00 s
The impact on light fixture swing
A point charge +6.7 uC is placed at the origin, and a second charge -3.6 uC is placed in the X - Y plane at (0.40 m , 0.55 m ). Where should a third charge be placed in the plane
You have a solid conducting sphere (radius A, net charge -2Q) surrounded by a conducting spherical shell (inner radius B, outer radius C, net charge +3Q). What is the electric field everywhere
A spacecraft has a nonrelativistic (or classical) momentum whose magnitude is 1.3e14 kg · m/s. Find the relativistic momentum of the spacecraft
A 12.0 resistor is made from a coil of copper wire whose total mass is 20.0. What is the diameter of the wire and How long is it
An old wooden tool is found to contain only 18% of 146C that a sample of fresh wood would. How old is the tool
An 20cm--long bicycle crank arm, with a pedal at one end, is attached to a 25cm--diameter sprocket, What is the tangential acceleration of the pedal
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