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A 50 kg crate slides down a 6 m ramp inclined at an angle of 35 degrees to the horizontal. A worker pushes on the crate parallel to the ramp so that it slides down with a constant velocity. If the coefficient of kinetic friction is .33
a) write equations of motion for the system
b) solve for the force exerted by the worker and compute the work done by the worker
c) compute the force of kinetic friction and find the work done by kinetic friction
d) how much work is done by gravity?
Two objects are connected by a string passing over a light frictionless pulley.Compute the speed of each object just as they pass each other
a 400 kg mass is released at rest from a distance of two earth radii above the surface of the earth. find the speed of
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What is the net force exerted by these two charges on a third charge q3 = 49.5 nC placed between q1 and q2 at x3 = -1.195m
The work completed by friction on the rock when it moves from point to point at the bottom of the bowl has magnitude 0.22. Just as the rock reaches point, what is the normal force on it because of the bottom of the bowl .
A small ball is doing circular motion around a pole. The string connecting the pole and the ball is 30 degrees (?) away from the pole. Find the linear speed of the ball
In frame S, event B occurs 2 microseconds after event A and event A occurs at the origion whereas event B on the x-axis at x=3.3km. How fast must an observer be traveling along the +x axis
A conducting sphere is placed among two charged parallel plates. Does the electric field inside the sphere depend on precisely where among the plates the sphere is placed? What about the electric potential inside the sphere?
A ball has a density of 900 kg/m3 and it's volume is0.03m3. To submerge in water the ball must be held downby the force. What is the force required to keep the ball submerged?
A 4.5kg dog stands on an 18 kg flatboat at distance D = 6.10m from the shore. It walks 2.4 m along the boat toward shore and then stops. Assuming no friction between the boat and the water, find how far the dog is then from the shore.
The maximum angular magnification of a magnifying glass is 12.0 when a person uses it who has a near point that is 25.0 cm from his eyes. Obtain the focal length of the objective
Assume that block C with mass mC is pushed to the left on a surface with a friction by a horizontally applied force Fapp and that the block is connected by a cord passing through a frictionless pulley to a hanging block D with mass mD
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