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Q1. Some sliding rocks approach the base of a hill with a speed of 14m/s. The hill rises at 41.0 degrees above the horizontal and has coefficients of kinetic and static friction of 0.400 and 0.630, correspondingly, with these rocks. Start each part of your solution to this problem with a free-body diagram.
Find out the acceleration of the rocks as they slide up the hill.
If it slides down, find out its acceleration on the way down, else enter 0.
Q2. A college campus features a large fountain surrounded by the circular pool. Two students start at the northernmost point of pool and walk slowly around it in opposite directions.
You're carrying a 4.0-m-long, 25 poles to a construction site when you choose to stop for a rest. You place one end of the pole on a fence post and hold the other end of the pole 35 from its tip. How much force should you exert to keep pole motionles..
Though slow on land, the leatherback turtle holds record for the fastest water speed of any reptile: 9.78 m/s. It is also among the largest of reptiles. Assume the largest leatherback yet discovered were to swim at the top leatherback speed. If its k..
What is the terminal speed at which the bar falls? Imagine the bar remains horizontal and in contact with the rods at all times.
How much heat does it take to enhance the temperature of 8.00 of an ideal monatomic gas from 22.0 to 61.0 if the gas is held at constant volume.
A horizontal force of 213 N is exerted on a 1.90 kg discus as it rotates uniformly in a horizontal circle (at arm's length) of radius 1.60 m. determine the time for one revolution of the discus. Round the answer to 2 decimal places.
Eight lights are connected in parallel to a 116 V source by two leads of total resistance 1.1. If 240 mA flows through each bulb, what is the resistance of each? What fraction of the total power is wasted in leads.
What is the decibel level required for human perception
Then find the force between them as a function of distance h. describe why the sign of the force does (or does not) make sense to you.
What is velocity curve between two times
Use approximate calculations assuming constant current during the output pulse. Calculate the ampere-hour rating of the battery so it lasts for five years.
How much time elapses between first splash and second splash
A 36.0 g bullet moving at 478 m/s strikes a 3.7 kg bag of flour that is on ice, at rest. The bullet passes during the bag, leaving at 255 m/s. How fast is the bag moving when the bullet exits.
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