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Katie and Emily are riding on a circular merry-go-round that has a radius of 5 m. Katie is on a horse that is 2.5 m from the center of merry-go-round and Emily is on a tiger that is 4.5 m from the center of the merry-go-round. What is Katie’s tangential velocity if her angular velocity is 0.5 rad/s? What is Emily’s tangential velocity if Katie's angular velocity is 0.5 rad/s?
A proton accelerates from rest in a uniform electric field of 652 N/C. At some later time, its speed is 1.26 106 m/s. How far has it moved in that interval
A rescue plane wants to drop supplies to isolated mountain climbers on a rocky ridge 235 m below. With what speed do the supplies land in the latter case
A refrigerator has a surface area of 6.04 m2. It is lined with 0.0885-m-thick insulation whose thermal conductivity is 0.0300 J/(s m C °). How much heat per second is being removed from the unit
The speed of a particle moving in a circle 2.0 m in radius increases at the constant rate of 4.4 m/s2. what is the speed of the particle
A 65- kg child sits in a swing suspended with 3.4- m-long ropes. The swing is held aside so that the ropes make an angle of 60 o with the vertical
You heat a 585 cm3 sample of a substance from 129°C to 283°C, Calculate the coefficient of volume expansion of this substance
A solid disk rotates in the horizontal plane at an angular velocity of 0.036 rad/s with respect to an axis perpendicular to the disk at its center, what is the angular velocity of the disk
A drag racer crosses the finish line of a 304.8 m track with a final speed of 126 m/s. how long would it take to finish the race
At one instant a bicyclist is 75m due east of a park's flagpole, going due south with a speed of 13.0 m/s. Then, 10s later, the cyclist is 65 m due north of flagpole, going due east with a speed of 20.0 m/s.
Draw a free body diagram for the skydiver in the instant after he jumps.(Assume that at this point his velocity is near zero so that air resistance is still negligible.)
A point charge q(1)= 85.9 micro C is held fixed at the origin. A second point charge, with mass m = 6.00×10?2kg and charge q(2)= -2.36 micro C , is placed at the location (0.323 m, 0).
A major-league catcher gloves a 85 mi/h pitch and brings it to rest in 0.17m. If the force exerted by the catcher is 803 N, what is the mass of the ball.
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