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A horizontal 792-N merry-go-round is a solid disk of radius 1.43 m, started from rest by a constant horizontal force of 50.3 N applied tangentially to the edge of the disk. Find the kinetic energy of the disk after 2.92 s
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Assume that the blocks accelerate as shown with an acceleration of magnitude a= 0.550 m/s^2 and that the coefficient of kinetic friction between block 2 and the plane is μ= 0.400. Find out the mass of block 2, m2, when θ= 30.0.
The ball leaves his racket with a speed of 16.0 m/s at an angle 5.5 degrees above the horizontal. The horizontal distance to the net is 7.0 m and the net is 1.0 m high. Explain by how much did the ball clear the net?
What is the terminal speed for a 76.0 skier going down a 41.0 snow-covered slope on wooden skis = 0.070? Suppose that the skier is 1.80 m tall and 0.500 m wide. Replace mg with net forces parallel to the incline.
The smallest insects that a bat can detect are approximately the size of one wavelength of the sound the bat makes. What is the minimum frequency of sound waves needed for the bat to detect an insect that is 0.53 cm long? (Assume the speed of soun..
Consider a 10-kg block resting on a frictionless plane inclined 30 o connected by a rope through a pulley to a 10-kg block hanging free. What is the direction and magnitude of the resulting acceleration of the 2-block system?
find the lowest frequency that make constructive interference.
A 144-g baseball moving 29m/s strikes a stationary 5.25-kg brick resting on small rollers so it moves without significant friction. Determine the baseball's speed after the collision
A long, straight wire carries a 25.0 current. An electron is fired parallel to this wire with a speed of 280 in the same direction as the current, 2.30 from the wire.
A small ball rolls off the roof edge with a horizontal speed of 3.2m/s. The ball hits the ground a distance of 12.6m from the building's base. Calculate the hieght of the building
A child goes down a playground slide with an acceleration of 1.40. Find out the coefficient of kinetic friction between the child and the slide if the slide is inclined at an angle of 31.0 below the horizontal.
You have a 2.01-m-long stretched string with a mass of 19.5 g. When you oscillate the string at 440 Hz, Calculate the tension in the string
Suppose a ping-pong ball and a bowling ball are rolling toward you with the same momentum, and you exert the same average force in stopping each of them.
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