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A wagon is rolling forward on level ground. Friction is negligible. The person sitting in the wagon is holding a rock. The total mass of the wagon, rider, and rock is 97.0 kg. The mass of the rock is 0.350 kg. Initially the wagon is rolling forward at a speed of 0.460 m/s. Then the person throws the rock with a speed of 16.5 m/s. Both speeds are relative to the ground. Find the speed of the wagon after the rock is thrown directly forward.
= ? m/s
Also, Find the speed of the wagon after the rock is thrown directly backward.
An electron ( mass = 9.11×10?31kg ) leaves one end of a TV picture tube with zero initial speed and travels in a straight line to the accelerating grid, If the accelerating force is constant, compute the acceleration of the electron
Two lenses that are L = 42 cm apart are used to form an image, as shown in figure. Find the distance from lens and magnification of the image.
Carbon disulfide (CS2) has a vapor pressure of 300 Torr at room temperature (almost half of atmospheric pressure). estimate the average time between collisions
In an amusement park ride called The Roundup, passengers stand inside a 16.0m -diameter rotating ring. how much force does the ring push on her at the top of the ride
Design a circuit to control the temperature of a water bath at a set-point temperature of 85°C. Choose a resistive sensor and draw up a circuit that will provide control around the set-point.
q1. a ferris wheel is a vertical circular amusement ride with radius 6 m. riders sit on seats that swivel to remain
A child with a mass of 55 kg is riding on a merry-go-round. If the child has a speed of 3 m/s, what is the child's angular momentum
A softball pitcher throws an underhanded pitch with the arm fully extended (straight at the elbow). What force did the muscles exert to cause the arm to rotate
Compute the final equilibrium temperature.
Two football players are initially 2m apart. At the same instant they accelerate towards each other, Draw a picture. Define your coordinate system
A cube of ice is taken from the freezer at -8.50C and placed in a 95-g aluminum calorimeter filled with 310 g of water at room temperature of 200C
A generator uses a coil that has 390 turns and a 0.65-T magnetic field. The frequency of this generator is 60.0 Hz, determine the length of the wire from which the coil is made
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