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An 82.0 kg skydiver jumps out of a balloon at an altitude of 1 280 m and opens the parachute at an altitude of 190 m.
(a) Assuming that the total retarding force on the diver is constant at 70.0 N with the parachute closed and constant at 3 600 N with the parachute open, what is the speed of the diver when he lands on the ground?
___________m/s
(b) Do you think the sky diver will be injured? Explain.
(c) At what height should the parachute be opened so that the final speed of the skydiver when he hits the ground is 5.00 m/s?
__________m/s
(d) How realistic is the assumption that the total retarding force is constant? Explain your answer.
A ball of mass 0.113 kg is dropped from a height of 1.92m above ground. The acceleration of gravity is 9.8m/s^2.Neglecting air resistance find the speed of the ball when it is at a height of 0.812 m above the ground. Answer in units of m/s.
A pot of hot water is boiling on your stove. The pot is in the shape of a round cylinder made of aluminum which is 10 cm in radius. The aluminum is 3 mm thick.
A uniform, solid disk is acted on by a tangential force F, as shown. The disk is free to rotate about its central axis without friction. What is the net torque on the disk
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A small rocket is powered upward on lift-off by an engine thrust of 12,000-N. If the resulting upward acceleration is 6.40m/s^2, what is the mass of the rocket?
the official record for the lowest temperature ever recorded on earth was set at Vostok, Antarctica, on July 21, 1983. what is this temperature in degree fahrenheit
A concave mirror (f = 49 cm) produces an image whose distance from the mirror is one-fourth the object distance. Determine the object distance.
A pion traveling at speed v decays into a muon and neutrino. at what angle does the muon come off
A basketball of mass 610g and circumference 76cm is rolling without slipping on a gym floor. Treating ball as a hollow sphere, what fraction of its total kinetic energy is associated with its rotational motion.
Three men are riding on a train of proper length L that is moving at speed v = 3/5 c with respect to the ground, Calculate the time difference between the two emissions, in both frames
A sled slides without friction down a small, ice-covered hill. If the sled starts from rest at the top of the hill, its speed at the bottom is 7.50 m/s. What is the speed at the bottom of the hill
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