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Q. A spring and block are in the arrangement of the figure below. When the block is pulled out to x = +2.0 cm, we must apply a force of magnitude 480 N to hold it there. We pull the block to x = +12.5 cm and then release it.
How much must this spring be stretched to store.
A 13 g bullet traveling 215m/s penetrates a 2 kg block of wood and emerges cleanly at 157m/s. If the block is stationary on a frictionless surface when hit, how fast does it move after bullet emerges.
Kieran takes off down a 50m high, 10° slope on his jet-powered skis. The skis have a thrust of 320 N. The combined mass of skis and Kieran is 50 kg (the fuel mass is negligible). Kieran's speed at the bottom is 40 m/s. What is the coefficient of k..
Two protons are moving directly toward one another. When they are very far apart, their initial speeds are 2.10 x 105 m/s. What is the distance of closest approach?
Compute the coefficient of kinetic friction
The loaded cab of an elevator has a mass of 3.0 x10^3 kg and moves 171 m up the shaft in 23s at constant speed. At what average rate does the force from the cable do work on the cab.
What is the magnitude of the normal force that each brake pad applies to the rim . find the length of the meterstick as measured in frame S1 according to classical physics. Reply in units of m.
Assume that you wish to fabricate a uniform wire out of .60 g of copper. Assume the wire has a resistance R = 0.300 and all of the copper is used.
A 44 cm diameter loop is rotated in a uniform electric field until the position of maximum electric flux is found. The flux in this position is 5.40 x10^5 N·m2/C. What is the magnitude of the electric field.
At t = 5.0 seconds, the cheetah is standing still, having knocked over the gazelle. Illustrate what is the average acceleration of the cheetah from t = 0 to t = 5.0 seconds?
There are four coils of wire being used as electromagnets. They all have the equal size and are made up of the same material but have a different number of loops.
find magnitudes of the tension forces in the first two ropes. what is the velocity of the cart when it reaches its greatest y coordinate.
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