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A tennis player swings her 1000g racket with a speed of 10m/s . She hits a 60g tennis ball that was approaching her at a speed of 21m/s . The ball rebounds at 40m/s .
1) How fast is her racket moving immediately after the impact? You can ignore the interaction of the racket with her hand for the brief duration of the collision.?
2) The tennis ball and racket are in contact for 12ms , what is the average force that the racket exerts on the ball?
What relationship can you infer about the directions of the electric field lines and equipotential lines, What is the potential of the conductor
At the instant shown, the spring is unstretched and B is moving downward at 4 ft/s. Use conservation of energy to identify velocity of B when it has moved downward 2 ft from its current position.
obtain the equation of motion for a 125g mass at the end of a perfectly elastic spring which when stretched 14.5 cm from equilibrium, find the maximum velocity and total energy of the mass
A spring of spring constant k=12.50 N/m is hung vertically. A 0.5000 kg mass is then suspended from the spring. What is the displacement of the end of the spring
a silver dollar of mass 200gm, and diameter 8cm, has a small hole punched through it at 2 cm from the center. the coin is initially at rest in a vertical plain with the hole directly under the center, what is the angular velocity of the coin at its..
An arteriole has a length of 1.03 mm and a radius of 24.7 %u03BCm. Calculate the resistance of the arteriole
A 94-kg fullback is running at 3.7m/s to the east and is stopped in 0.85 s by a head-on tackle by a tackler running due west. Calculate the original momentum of the fullback
A brick is thrown upward from the top of a building at an angle of 20° to the horizontal and with an initial speed of 10 m/s. how tall is the building
1 once the simulation opens click on lsquoshow both for velocity and acceleration at the top of the page. now
The frequency of an electromagnetic wave is f = 3.75 x 1014 Hz, What is the index of refraction n of the material
A submarine dives to a depth of 157 feet in the ocean. What is the force (in pounds) acting on a hatch
A 600-kg car is going over a curve with a radius of 120 m that is banked at an angle of 25 degrees with a speed of 30.0 m/s. What is the normal force exerted by the road on the car
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