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Q. A person pulls a toboggan for a distance of 40m along the snow with a rope directed 25 degrees above the snow. The tension in the rope is 83N.
A) How much work is completed on the toboggan by the tension force?
B) How much work is completed if the similar tension is directed parallel to the snow?
A stationary radar operator determines that a ship is 17 km south of him. An hour later the same ship is 21 km southeast. If the ship moved at constant speed and always in the similar direction, what was its velocity during this time.
To store the energy produced in 1hour by a 110 electric power plant, how many cubic meters of water will have to be pumped from the lower to the upper reservoir? Suppose the upper reservoir is 510 meters above the lower one, and we can neglect the sm..
A 1500 -kg automobile travels at a speed of 75 -km/h along a straight concrete highway. Faced with an emergency situation, the driver jams on the brakes, and the car skids to a stop.
A simple harmonic oscillator takes 12.0 s to undergo six complete vibrations.
A radar antenna is tracking a satellite orbiting the earth. At a certain time,the radar screen shows the satellite to be 162 km away.The radar antenna is pointing upward at the angle of 62.3 degrees from the ground.find the x and y components(in k..
A car is driven 155 km west and then 75 km southwest. What is the displacement of the car from the point of origin (magnitude and direction).
find the ratio of vb to vr, where vr is defined above and vb is the boats speed with respect to the water.
A 50.0 g silver spoon at 20.0 C is placed in a cup of coffee at 90.0 C. How much heat does the spoon absorb from the coffee reach a temperature of 89 C.
An electron is then fired directly toward the center of the shell, from point P at distance r from the center of the shell (r >> R). What initial speed v0 is needed for the electron to just reach the shell before reversing direction.
A force of 315 N is applied horizontally to a wooden crate in order to displac eit 35.0 m accorss a level surface at a constant velocity. As a result of this work the crate's internal energy is increased by an amount equal to 14 percent of the cra..
A cardinal (Richmondena cardinalis) of mass 4×10-2 kg and a baseball of mass 0.143 kg have the same kinetic energy. What is the ratio of the cardinal's magnitude p_c of momentum to the magnitude p_b of the baseball's momentum.
What is the block's distance from equilibrium as the speed are 36 cm/s? What is block's position at t=1.0 s.
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