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A tennis player swings her 1000 gram racket with a speed of 15 m/s. She hits a 60 gram tennis ball that was approaching her at a speed of 15 m/s. The ball rebounds at 45 m/s.
Find how fast is her racket moving immediately after the impact? You can neglect the interaction of the racket with her hand for the brief duration of the collision.
If the tennis ball and racket are in contact for 11 milliseconds, obtain the average force that the racket exerts on the ball?
Oppositely charged parallel plates are separated by 4.52 mm. A potential difference of 600 V exists between the plates. (a) What is the magnitude of the electric field between the plates?
A movie projector is equipped with a 0.6-meter focal length lens that is positioned 0.605 meters from the film. How many times larger is the image than the object
The distance to a star is approximately 4.50 x 1018 meter. If this star were to burn out today, in how many years would we see it disappear
A boat clashed on something and fell to the ocean floor, a few years later a few researchers sent a robot and found out that the pressure at the same level as the boat was 413 atm. The density of the seawater was 1025 kg/m cubed. what is the depht of..
Two parallel wires 10 cm apart carry currents of 18 A. What is the magnetic force between two wires for both case
A record turntable is rotating at 33 1/3 rev/min. A watermelonseed is on the turntable 6.5 cm fromthe axis of rotation. Calculate the acceleration of the seed, assumingthat it does not slip
Two bullets are fired at the same time with the same kinetic energy. If one bullet has twice the mass of the other, which has the greater speed
A car of mass 2000kg is lifted up a a distance of 30m by a crane in 1 min. A second crane does the same job in 2 min. Do the crane consume the same or diffrent amounts of fuels
two uncharged spherical conductors are separated by a long distance. sphere a of radius r1 8cm is charged with q1
One end of a stretched string is moved transversely at constant velocity Vy for a time T, Calculate the kinetic and potential energy energies associated with the pulse
Assuming wind forces can be neglected, what is the highest that one can make a solid concrete tower of uniform cross-section (Take the density of concrete to be 2,400 kg/m^3)
A car is traveling at a constant speed of 20 m/s (about 44 mi/h) that is initially traveling due northwest rounds a corner so that after 10 s, What are the magnitude and direction of the car's average acceleration during this interval of time
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