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A shopper pushes his cart with a horizontal force of 50. N over a level but rough parking area for a distance of 5.0 m. If a friction force of 43 N acts on the cart, what is the net work done on the cart?
A bluray disc is 12cm in diameter. When you put it into the player it takes 30 seconds for the disc to accelerate to its playing speed; 1500 revolutions per minute. find number of revolutions the disc makes
Two identical objects traveling in opposite directions with thesame speed V make a head-on collision. Find the speed of the second object after the collision if they stick together
An AC power generator produces 50 A (rms) at 3600 V. The voltage is stepped up to 100 000 V by an ideal transformer and the energy transmitted throughout a long-distance power line with a total resistance of 100 Omega. What is the rms current in l..
Consider the simplified single-piston engine in the figure below. If the wheel rotates at a constant angular speed, explain why the piston rod oscillates in simple harmonic motion
Two people carry a heavy electric motor by placing it on a light board 2.30m long. One person lifts at one end with a force of 420N , find Where is its center of gravity located
A transformer connected to a 125 V (rms) ac line is to supply 12000 V (rms) for a neon sign. What current rating should the fuse in the primary circuit have
A bathysphere used for deep-sea exploration has a radius of 1.50 m and a mass of 1.19 104 kg. In order to dive, this submarine takes on mass in the form of sea water.
What is Professor Splash's kinetic energy when he hits the water? Assume his mass is 90 kg. Don't use comma's or scientific notation in your answers.
q1. an 920 n sled is pulled a distance of 197 m. the task requires 1.20 104 j of work and is completed through pulling
Suppose you look through a 3.3 mm thick window comprised of a material whose refractive index is 1.63. Find by what time interval is the light you see delayed by having to go through glass instead of air
q1. tarzan m 75 kg tries to cross a river by swinging from an 11.0 m long vine. his speed at the bottom of the swing
Two particles each weigh 1.03 N. Find the magnitude of their mutual gravitational force when they are separated by a distance of 21.1 cm
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