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Consider a tennis ball that is hit by a player at the baseline with a horizontal velocity of 50 m/s (about 110 mi/h). The ball travels as a projectile to the player's opponent on the opposite baseline, 24 m away, and makes 30 complete revolutions during this time. What is the ball's angular velocity?
rad/s
a 20 kg mass sits on an inclined plane with friction making an angle of 50 degrees with respect to the horizontal. calculate the frictional force required to keep the mass from sliding down the incline
You're driving along a rural highway in a light rain at 62 mph (28 m/s). Just after rounding a bend, you see a 30-mph (13 m/s) speed zone ahead, with a police car parked just beyond the sign.
Assume a light ray hits the surface of the water in a container 39 inches deep at an angle of incidence of 18 degrees. Determine the time taken for the light to hit the bottom of the container
Two masses are connected by a string as shown in the figure. Mass = 2.1 rests on a frictionless inclined plane, what will be the resulting acceleration of the masses
A block of mass 1 kg is on a turntable 0.5 m from the center of the turntable. Find the angular speed of the turntable as a function of time
A concave mirror has a radius of curvature of 24cm. Determine the object position for which the resulting image is upright, draw a ray diagram to determine the position of the image
A string on a guitar is stretched between two points 35.0 cm apart with a tension of 65.0 N. The velocity of wave propagation on the string is
If 61.5 L of oxygen at 18C and an absolute pressure of 2.45 atm are compressed to 48.8L and at the same time the temperature is raised to 56 degrees C, what will the new pressure be
Consider an LR circuit with a variable inductor and with deltaVs=150 V, f=60Hz, R=5 ohms. Calculate the power in the resistor
assume that for the couple in, you were told that the girl's mass was two-thirds that of the boy. The boy has a velocity of v = +0.61 m/s. What would be the girl's velocity in this case.
How much work should Denise do to drag her basket of laundry of mass 6.0 kg a distance of 3.0 m along a floor, if the force she exerts is a constant 50.0 N at an angle of 70.0° with the horizontal.
A 2.78-kg steel ball strikes a massive wall at 10.0 m/s at an angle of ? = 60.0° with the plane of the wall, what is the average force exerted by the wall on the ball
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