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When serving a tennis ball, the player hits it when its velocity is zero (at the highest point of a vertical toss). The racket exerts a force of 540 N on the ball for 5.00 ms, giving it a final velocity of 45.0 m/s. Using these data, find the mass of the ball.
g
Two masses are placed on the x axis. The first mass 320kg is located at x = 310cm , the second mass 660kg is at the origin
A (20.1+/- 0.2)ohm resistor is connected in parallel with a (39.9+/- 0.4)ohm resistor. The resistors are connected to a (2.90+/-0.03)V battery, Calculate the total current in the circuit
A large, flat, horixontal sheet of charge has a charge per unit area of 8.5%u03BCC/m^2. Find the electric field just above the middle of the sheet
The speed of a longitudinal wave in a mixture of helium and neon at 300k was found to be 758m/s. what is the composition of the mixture
A cannonball is shot (from ground level) with an initial horizontal velocity of 40 m/s and an initial vertical velocity of 21 m/s, What is the initial angle of the cannonball with respect to the ground
A rectangular coil of 58 turns, dimensions 0.100 m by 0.200 m, and total resistance 10.0 ? rotates with angular speed 35.0 rad/s, Calculate the maximum induced emf in the coil
A toy cannon uses a spring to project a 5.23 g soft rubber ball. The spring is originally compressed by 4.90 cm and has a force constant of 8.04 N/m. At what point does the ball have maximum speed
A window air-conditioner unit absorbs 9.70×104J of heat per minute from the room being cooled, What is the energy efficiency rating of the unit
You want to shoot a 19cm long arrow parallel to this axle and through the wheel without hitting any of spokes. Suppose that the arrow and the spokes are very thin.
A picture hangs on the wall suspended by two strings, as shown in the figure, with theta = 68°. The tension in string 1 is 1.4 N. What is the weight of the picture
A bicycle is moving at a speed v = 4.26 m/s. If the radius of the front wheel is 0.450 m, how long does it take for that wheel to make a complete revolution.
Suppose a 63.00 kg boy and a 50.00 kg girl use a mass less rope in a tug-of-war on an icy, resistance-free surface. If the acceleration of the girl toward the boy is 3.00 m/s2, find out the magnitude of the acceleration of the boy toward girl.
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