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A child on a sled is initially at rest on an icy horizontal surface. The sled is pushed until it reaches a final velocity of 5.70 m/s in a distance of 14.6 m. The coefficient of friction between the ice and runners of the sled is 0.200, and the weight of the child and the sled is 355 N. Find the work done by the force pushing the sled.
A 51.1 kg bungee jumper jumps off a bridge and undergoes simple harmonic motion. what is the spring constant of the bungee cord
In open heart surgery a much smaller amount of energy will defibrillate the heart, What voltage is applied to the 9.00 µF capacitor of a heart defibrillator that stores 55.0 J of energy
What is the kinetic energy of a 1500 kg car traveling at a speed of 35 m/s (76 mph), Does your answer to part b depend on the car's mass
Alpha particles (charge = +2e, mass = 6.68* 10^-27 kg) are accelerated in a cyclotron to a final orbit radius of 0.50 m. Determine the kinetic energy of an alpha particle in the final orbit
After the collision, the 2.00-kg object has a velocity 5.00 m/s to the west. How much kinetic energy was lost throughout the collision.
A near-sighted person might correct his vision by wearing diverging lenses with focal length f = -55cm. Use ray tracing to determine the height of the image
A ball of mass 0.25 kg is attached to a string 0.750 m long. The ball is swung in a pendulum-type motion such that it has a speed of 6.40 m/s, What is the corresponding tension in the string
A 10-kg crate is placed in the bed of a truck at rest on horizontal ground. The truck accelerates uniformly at 1 m/s^2for 10 seconds. What is the sign of the work done on the crate
A rifle with a mass of 1.76 kg fires a bullet with a mass of 5 g (0.005 kg). The bullet moves with a muzzle velocity of 401 m/s after the rifle is fired. what is the recoil velocity of the rifle
A spinning flywheel has rotational inertia I = 401.0 kg · m2. Its angular velocity decreases from 20.4 rad/s to zero in 261.6 s due to friction
An open organ pipe and an organ pipe that is closed at one end both have lengths of 0.48m at 20 C
A certain lightbulb has a tungsten filament with a resistance of 18.9 ? when at 20.0°C and 139 ? when hot. Find the temperature of the hot filament
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