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A skier of mass 66 kg is pulled up a slope by a motor-driven cable.
(a) How much work is required to pull him 75 m up a 30° slope (assumed frictionless) at a constant speed of 2.1 m/s? Your response differs from the correct answer by more than 10%. Double check your calculations. J (b) What power must a motor have to perform this task?
hp
The nucleus of an atom consists of protons and neutrons (no electrons). A nucleus of a carbon-12 isotope contains six protons and six neutrons.
A proton is placed in an electric field of intensity 700 N/C. What is magnitude and direction (towards or away from the field) of the acceleration of this proton because of this field? The charge on a proton is +1.6 x 10-19 C and the mass of a prot..
An adventurous archaeologist crosses between two rock cliffs. If the angle between the rope and the horizontal is = 11.8, find out the tension in the rope.
If Jessica can accelerate at a speed of 5-m/s^2, how long will it take for her to reach a speed of 30.0 m/s.
A particle attached to a spring with k 50 N/m is undergoing simple harmonic motion, and its position is described by the equation x (5.7 m)cos(7.5t), with t measured in seconds.
Find out the magnitude and direction of the displacement
what is the magnitude FN at the highest point. The positive charges are arranged in a square. sides- .10 m the top right is 9 nC bottom right is 3 nC and the bottom left is 1 nC. find the magnitude of the electric field at the fourth corner of the ..
How many revolutions does wheel make throughout the time
A motorist drives south at 27.0 m/s for 3.90 min, then turns west and travels at 25.0 m/s for 2.40 min, and finally travels northwest at 40.0 m/s for 1.00 min. For this 6.40 min trip, find the values.
find the force exerted by the rope on the bucket. A metallic object is given the negative charge by the process of induction. What happens to object's mass.
A hydraulic chamber with a spring (spring constant = 1600 N/m) attached to the input piston and a rock of mass 40kg resting on the output plunger.
Boxes A and B have masses of 12 kg and 4 kg, in that order. The two boxes are released from rest. Use conservation of energy to find out the boxes speed when box B has fallen a distance of 00.5 m.
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