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A ball on the end of a string is revolved at a uniform rate in a vertical circle of radius 72.0 centimeter. if its speed is 4.00 m/s, and its mass is .300 kilogram,
(a) find the tension in the string when the ball is at the top of its path,
(b) Find the tension in the string when the ball is at the bottom of its path.
An electric car accelerates for 8.0 s by drawing energy from its300-V battery pack. During this time,1190 C of charge passes through thebattery pack. Find the minimum horsepower rating of the car.
A uniform electric field has magnitude E = 270 N/C and is directed to the right. A particle with charge +4.3 nC moves along the straight line from a to b that is 0.25m in length, What is the work done on the particle by the electric field
q1. a tank with a volume of 0.150 m contains 27.0 degrees celsius helium gas at a pressure of 100 atm. how many
The natural length of the spring AP is twice that of spring PB. Spring AP has a stiffness of 118 N/m and the stiffness of spring PB is twice that of spring AP. The distance AB between the supports is equal to the natural length of the spring AP
A woman slowly lifts a box weighing 48.0 N from the floor to a shelf 1.50 m above, Find the net work done on the box
a 36 kg block slides with an initial speed of 8 ms up a ramp inclined at an angle of 15o with the horizontal. the
Find out kinetic energy of the merry-go-round
an object is released from rest on a planet that has no atmosphere. the object falls freely for 3.79 m in the first
Two insulated wires, each 2.90 m long,are taped together to form a two-wire unit that is 2.90 m long. One wire carries a current of 7.00 A;the other carries a smaller current I in the oppositedirection. The two wire unit is placed at angle of 51.0..
Two trains, each having a speed of 27 km/h, are headed at each other on the same straight track, What is the total distance the bird travels before the trains collide
Sam, whose mass is 74kg , straps on his skis and starts down a 44m -high, 20? frictionless slope. Use work and energy to find Sam's speed at the bottom
A uniform plank of length 2m and mass 10kg is supported at each end. If a 75kg person stands 0.5m from the left end of the plank, find the force exerted on the plank by each support
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