Thermal energy produced in the collision
Two railroad cars, each of mass 6500 kg and traveling 87 km/h in opposite directions, collide head-on and come to rest. How much thermal energy is produced in this collision?
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A mass m is being lifted upward by means of a vertical spring of force constant k,with a uniform upward acceleration 'a'.If at the instant its velocity is v= A g.√(3m/k) the upper end of the spring is suddenly brought to rest, calculate the
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Speedboat A negotiates a curve whose radius is 114 m. Speedboat B negotiates a curve whose radius is 192 m. Each boat experiences the same centripetal acceleration. What is the ratio vA/vB of the speeds of the boats?
A horizontal bar with a mass m suspended from one end is held by a cord with tension T, fastened at a distance D from the end of the bar that is attached to a wall with a frictionless pin. What is the torque about the pin exerted on the bar by the
A 18.0-V battery is connected to a capacitor, resulting in 45.0 µC of charge stored on the capacitor. How much energy is stored in the capacitor?
Electrodes called paddles are held against the chest on both sides of the heart, and the capacitor is discharged through the patient's chest. Assume an energy of 270 J is to be delivered from a 30.0-µF capacitor. To what potential difference
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