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A farm tractor tows a 4830 kg trailer up a 15.5° incline at a steady speed of 2.0 m/s. What force does the tractor exert on the trailer?
An electron with a speed of 7.98 × 108 cm/s in the positive direction of an x axis enters an electric field of magnitude 2.25 × 103 N/C, how much time will have elapsed
A hot air balloon is a bit like a bubble in water. It rises in air when the mass of relatively cool surrounding air displaced by the balloon is greater than the mass of the balloon and the gondola that hangs below it.
Then the driver sees a red light up ahead at next intersection, and starts slowing down at the constant rate. The car stops at the red light, 180 {rm m} from where it was at t = 0.
How to compute the average force
A source produces sound waves of time period .001 second and wave length of 20 cm. find the time taken by sound waves to travel a distance of 800 metres.
At a dock, a crane lifts a 1200 kg container 30 m, swings it out over the deck of a frieghter, and lowers the container into the hold of the freighter, which is 10 m below the level of the dock. The acceleration of gravity is 9.8 m/s2. Neglect fri..
What is the magnitude of the negative point charge that must be fixed to the fourth corner, so that the charge at the diagonally opposite corner experiences a net force of zero?
A 2.10-cm-high insect is 1.50m from a 139-mm-focal-length lens. Where is the image? Follow the sign conventions, How high is the image
You can think of the work?kinetic energy theorem as a second theory of motion, parallel to Newton's laws in describing how outside influences affect the motion of an object. Use the work-kinetic energy theorem to find the net work that is done on t..
Galileo's great-great-great grandchild stands at the top of a vertical tower 53.4 m tall with a Chianti bottle, What is the velocity of the bottle as it hits the ground, if it was just dropped from the tower
A circular loop of conducting wire, with radius a and resistance R, is placed in a magnetic field. Find an expression for the induced current in the loop as a function of time
Pick at least two sample cases and for each sample case include both a physical reason you'd expect fo to go up or down (think about how sound waves are squishing together or spreading apart) and a mathematical reason (like will picking a + in the..
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