A farmer hitches her tractor to a sled loaded with firewood…
A farmer hitches her tractor to a sled loaded with firewood and pulls it a distance of 20 m along level ground. The total weight of sled and load is 14,700 N. The tractor exerts a constant 5000-N force at an angle of f = 36.9° above the horizontal, as shown in the figure. A 3500-N friction force opposes the sled’s motion. Find the total work done by all the forces on the sled.
Read DetailsOn the planet Arrakis a male ornithoid (a bird) is flying to…
On the planet Arrakis a male ornithoid (a bird) is flying toward his mate at 25.0 m/s while singing at a frequency of 1200 Hz. If the stationary female hears a tone of 1240 Hz, what is the speed of sound in the atmosphere of Arrakis?
Read DetailsA gymnast of mass 58.0 kg hangs from a vertical rope attache…
A gymnast of mass 58.0 kg hangs from a vertical rope attached to the ceiling. You can ignore the weight of the rope and assume that the rope does not stretch. What is the tension T in the rope if the gymnast climbs the rope at a constant velocity of 5.0 m/s?
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