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A ball falls straight down onto a wedge that is sitting on frictionless ice. The ball has a mass of 3.33 kg, and the wedge has a mass of 5.11 kg. The ball is moving a speed of v = 4.47 m/s when it strikes the wedge, which is initially at rest. a) Assuming that the collision is instantaneous and perfectly elastic, what is the velocity of the wedge after the collision?
A car is traveling 17 m/s when the driver sees a child standing on the road. He takes 0.8 s to react, then steps on the brakes and slows at 7.5 m/s2. How far does the car go before it stops.
A moving body undergoes uniform acceleration while travelling in a straight line between points X, Y and Z. The distances XY and YZ are both 40m. The time to travel from X to Y is 12s and from Y to Z is 6s.
The thrust produced by a single jet engine creates a force of F = 63000 N. It takes the jet (with a mass of m = 9300 kg) a distance of d = 0.75 km to take off. What is the take-off speed of the jet vt in m/s
What is the angular acceleration of the wheel? If the wheel was initially at rest and the torque is applied for 15 s, what will be the rotational frequency of the wheel
Two automobiles, each of mass 1.500*10^3 kg, travel in the same direction along a straight road. find the translational kinetic energy of the center of mass
A wave of amplitude 0.40 m interferes with a second wave of amplitude 0.3 m traveling in the same direction. (a) What is the largest resultant amplitude that can arise.
a child is riding a merry go round, which has an instantaneous angular speed of 1.25 rad/s and an angular acceleration of .745 rad/s^2. what is the magnitude of the acceleration of the child
What the stopping distance of the car is as measured from the point where the driver first notices the red light.
what is the emf generated in the square loop as it is moved to the right in 0.2s out of the 0.8 T magnetic field? what is the intensity of the wave
A tee consisting of two thin rods each having a mass of M and with lengths L1 and L2, Find the rotational velocity of the tee-clay ball combination just after the collision
A woman in a movie fires a gun and is pushed backwards. The mass of the bullet is 0.050 kg and the bullet velocity is +850 m/s. What is the recoil velocity of the woman
Ray decides to paint the outside of his uncle's house. He uses a 4.0-m-long board supported by cables at each end to paint the second floor. find the force that the right cable exerts on the board
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