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Q. A 22.0-kg sled is being pulled across a horizontal surface at a constant velocity. The pulling force has a magnitude of 78.5 N and is directed at an angle of 30.0° above the horizontal. Determine the coefficient of kinetic friction.
Q. A spherical shell of mass 2.7 kg and radius 5.0 cm is given a charge of -7.0 mC and is held fixed in space. A second small spherical ball is brought to a spot 3 cm from the surface of the shell, released and moves away. The ball is small enough to be treated as a point charge, has a mass of 95 g and a charge of 4.0 microCouloumbs.
a. Determine the value of the electric potential at the initial and final position.
b. determine the position of the ball when it has a speed of 200 m/s using a reference point.
c. calculate the acceleration of the ball when it is 3 cm from the surface and again at the position determined in part b
Now consider this applet, where the two blocks have different masses. Plug the starting values into your formula from Part G, using 5 for mass of the red block and 10 for the magnitude of the acceleration of gravity.
Attempting to stop on a slippery road, a car moving at 80 skids across road at a 30 angle to its initial motion, coming to a stop in 3.8.
300 J of work are done to compress the gas as, in the same process, 1200 J of heat energy are transferred from the gas to the environment. Afterward, what is the rms speed of the molecules.
Charge of uniform density (80 nC/m^3) is distributed throughout a hollow cylinder region formed by two coaxial cylindrical surfaces of radii 1.0 mm and 3.0 mm. Determine the magnitude of the electric field at a point which is 2.0 mm from the symmetry..
A 116 kg chesterfield is pushed up a frictionless ramp at the constant speed by a delivery person. If the ramp is inclined at 25.80° to horizontal. What is the magnitude of the normal force that is exerted on the chesterfield by the ramp.
You're driving down the highway late one night at 18 when a deer steps onto the road 36 in front of you. The reaction time before stepping on the brakes is 0.50, and the maximum deceleration of your car is 12.
A person wears a hearing aid that uniformly increases the intensity level of all audible frequencies of sound by 29.7 dB. The hearing aid picks up sound having a frequency of 250 Hz at an intensity of 3.10 10-11 W/m2. What is intensity delivered to t..
At a large business, employees must report to work at 7:30 A.M. The arrival times of employees is approximately symmetric and mound-shaped with mean 7:22 A.M. and standard deviation 4 minutes.
A 65kg trampoline artist jumps vertically upward from the top of a platform that is 2 m above the trampoline with a speed of 4.80m/s.
At the beginning of the interval the astronaut is moving toward the right along the x-axis at 15.40, and at the end of interval she is moving toward the right at 5.40.
A plane flies from base camp to Lake A, 280 km away in the direction 20° north of east. After dropping off supplies it flies to Lake B that is 190 km at 30° west of north from Lake A. Graphically find out the distance and direction from Lake B to ..
Find the value of Q that would make the thickness of the equivalent body 0.1 times its length (i.e the value of y at the dividing streamline at x=0 is 1/10 of the x coordinate at the aft stagnation point.).
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