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A tennis player swings her 1000 g racket with a speed of 12.0m/s . She hits a 60 g tennis ball that was approaching her at a speed of 10.0m/s . The ball rebounds at 42.0m/s .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.If the tennis ball and racket are in contact for 8.00ms
what is the average force that the racket exerts on the ball?
What is the target's speed just after the bullet emerges?
A ferry boat transports tourists among three islands. It sails from the first island to the second island, 4.7 km away, in a direction 37.0° north of east. It then sails from the second island to the third island in a direction 69.0° west of north..
A projectile is red from level ground at an angle of 30 degree above the horizon. It hits the ground at t = 4 s. What is the magnitude of the initial velocity, v?
A certain car battery with a 14.0 V emf has an initial charge of 195 A•h. Assuming that the potential across the terminals stays constant until the battery is completely discharged, for how long in hours can it deliver energy at the rate of 184 W.
A bat strikes a 0.145-kg baseball. Just before impact, the ball is traveling horizontally to the right at 60.0m/s, Find the vertical component of the average force on the ball
A guitar string is 90 cm long and has a mass of 3.6g . The distance from the bridge to the support post is L=62cm, What is the fundamental frequency of this string
A physics professor is pushed up a ramp inclined upward at an angle 34.0 degrees above the horizontal as he sits in his desk chair that slides on frictionless rollers, Use the work-energy theorem to find his speed at the top of the ramp
If the barge can only be pushed 18 cm deeper into the water before water overflows to sink it, how many 400 kg horses can it carry.
A major-league pitcher can throw a baseball in excess of 44.2m/s. If a ball is thrown horizontally at this speed, how much would it drop by the time it reaches the catcher who is 16.10 m away from the point of release.
A jogger runs 100m due east, then changes direction for the second leg of the run. At the end of the run, she is 350m away from the starting point at an angle of 25.0° north of east. What were the direction and length of her second displacement? Util..
A 100g wire is held under a tension of 250N with one end at x = 0 and other x = 10m. At time t = 0, pulse 1 is sent along the wire from the end at x = 10 m. At time t = 30 ms, pulse 2 is sent along the wire from the x = 0. At what position x do the..
The strength of the magnetic field within a solenoid is B = 3.4 × 10-2 T, single loop is placed in the solenoid parallel to the plane of each loop in the solenoid, What is the total number of turns of the solenoid
At a certain location, the horizontal component of the earth's magnetic field is 4.90 10-5 T, due north. A proton moves eastward with just the right speed, so magnetic force on it balances its weight. Find the speed of the proton.
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