wwwwww Ax A 0.8kg box on a horizontal frictionless surface is moving to the right at a speed of 2.19m/s. The box hits and remains attached to one end of a spring of negligible mass whose other end is attached to a wall. As a result, the spring compresses a maximum distance of 4cm, and the box then oscillates back and forth. Think: the spring does work on the box from the moment the box first hits the spring to the moment the spring first reaches its maximum compression. Indicate whether the work done by the spring is positive. negative, or zero. Calculate the magnitude (absolute value) of this work.
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- A pendulum consisting of a particle of mass m supported by a light cord of length L is released from a position ho measured from the lowest position, as shown in the figure below. The cord hits a small peg P located at a distance L/2 vertically below the upper end of the pendulum. T ho m Ohz ho g How high will the mass swing afterwards? hint: consider the conservation of energy in the system. h = ho 12 h=2 ho L hDoing some physics homework and am kind of stumped here!As shown in the figure, a 1.50-kg box is held at rest against a spring with a force constant k = 790 N/m that is compressed a distance d. When the box is released, it slides across a surface that is frictionless, except for a rough patch that has a coefficient of kinetic friction u, = 0.400 and is 6.00 cm in length. If the speed of the box is 1.50 m/s after sliding across the rough patch, determine the initial compression d of the spring. cm Equilibrium position v=0' rough patch wwwwwn 6.00 cm
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- A mass of 4.0 kg traveling at 5.0 m/s along a smooth, horizontal plane hits a relaxed spring. The mass is slowed to zero velocity when the spring has been compressed by 0.18 m. What is the final spring force when the mass is stopped?OK, once again we have a pendulum, this time of length 1.86 m, which you release from rest at an angle of 52.5 degrees to the vertical. What will be the speed of the pendulum at the instant it reaches an angle of 10.5 degrees above the vertical? 3.78 m/s 0.78 m/s 5.67 m/s 3.70 m/sA 0.500 kg block is sitting on a horizontal, frictionless surface. The block is connected to a horizontal spring with a force constant of 124 N/m. The other end of the horizontal spring rests against a wall. When a 100.0 g arrow is fired into the wooden block, the spring compresses by 25 cm. (a) What is the maximum potential energy of the spring? (b) What was the speed of the arrow and block just after collision?(c) What was the initial kinetic energy of the arrow?(d) Explain any difference between (a) and (c).