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Q. A 60 ball of clay is thrown horizontally at 40 toward a 1.3 block sitting at rest on a frictionless hi surface. The clayts and sticks to the block. What is the speed of the block and clay right after the collision?
Q. A 52.0 kg ballet dancer stands on her toes during a performance with four square inches (26.0 cm2) in contact with the floor. What is the pressure exerted by the floor over the area of contact in some cases?
Starting from rest, a 40 kg body reaches a speed of 8.0m/s in 2s. Calculate the force acting on the body?
An engine does 20000 J of work and rejects 6120 J of heat into a cold reservoir whose temperature is 285 K. What would be the smallest possible temperature of the hot reservoir.
A father (m = 70 kg) and son (m = 45 kg) are standing facing each other on a frozen pond. The son pushes on the father and finds himself moving backward at 3 m/s after they have separated. How fast will the father be moving.
A glider of mass 1.00 kg is allowed to oscillate under the influence of a spring of spring constant 25.6 N/m while on a frictionless, horizontal air track. At t = 0 s glider is released from rest at x = 5.00 cm. (At equilibrium, the glider is at x = ..
A state highway patrol car radar unit uses a frequency of 8.00×10^9Hz. What frequency difference will the unit detect from a car receding at the speed of 44.50 from a stationary patrol car.
Assume that the rod is held at rest horizontally and then released. (Throughout the remainder of this problem, your answer may include the symbol, moment of inertia of the assembly, whether or not you have answered the first part correctly.)
A child goes down a playground slide with an acceleration of 1.22. Find out the coefficient of kinetic friction between child and slide if the slide is inclined at an angle of 31.0 below the horizontal.
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 rectangular container measuring 10cmx20cmx25cm is filled with gas. What is the mass volume of water in kilograms.
A toy train rolls around a horizontal 1.30 diameter track. The coefficient of rolling friction is 0.10.
Two speakers, one straight behind the other, are each generating a 285 Hz sound wave. What is the smallest separation distance between the speakers that will produce destructive interference at a listener standing in front of them? Suppose that the s..
What is the focal length of this mirror. If the object is 25 cm in front of the mirror, what is the image distance.
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