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A tennis ball has a velocity of 22 m/s and a mass of 58.7 g. After the ball hits a tennis racket, the velocity becomes twice that of the original speed and goes in the opposite direction. What is the force between the ball and the racket if the time that they interact is 0.04 s? Assume the force is constant.
In a fast-pitch softball game the pitcher is impressive to watch, as she delivers a pitch by rapidly whirling her arm around so that the ball in her hand moves in a circle. Determine the angle of the total acceleration relative to the radial direct..
A turtle ambles lesisurely- as turtles tend to do- when it moves from a location with position vector r1x = 1.07 m, find the magnitude of the turtle's average velocity
A wire of radius 1.5 mm carries a current of 2.8 A. The potential difference between points on the wire 20 m apart is 4.7V. determine the electric field in the wire
The two spheres are then connected by a thin conducting wire, What is the charge on the first sphere after the two spheres are connected by the wire
A pedestrain bridge consists of a walkway of mass 1000kg and length 10.0m supported at each end by brackets. Two people, each of mass 80kg, are walking across the bridge.
It collides with a 10,000 kg railway car resting at the bottom of the track with its brakes off. The two cars couple together and roll up the track to a height of h. find out h.
If there is a section of the hose where the diameter decreases to 1.93 cm, what is the speed of the water in this section
questiona white billiard ball with mass mw 1.32 kg is moving directly to the right with a speed of v 2.92 ms and
calculate and compare the energy released by (a) fusion of 1 kg of hydrogen deep within the sun and (b) the fisision of 1 kg U235 in a fission reactor
Wire 1 and 2 are made of the same metal. What is the ratio p2/p1 of the resistivities of the two wires
The red block in the %u201CSame Volume%u201D floats in water. what volume of the blue block would float above the water line if the blue block was placed on top of the red block in the water
Three 3 uC charges are at the three corners of a square of side 0.50 m. Find the electric field at the center of the square
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