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A basketball player jumps straight up for a ball. To do this, he lowers his body 0.250 m and then accelerates through this distance by forcefully straightening his legs. This player leaves the floor with a vertical velocity sufficient to carry him 0.800 m above the floor.
(a) Calculate his velocity when he leaves the floor.
(b) Calculate his acceleration while he is straightening his legs. He goes from zero to the velocity found in part (a) in a distance of0.250 m.
(c) Calculate the force he exerts on the floor to do this, given that his mass is 104 kg.
A swimmer, capable of swimming at a speed of 1.0 m/s in still water (i.e., the swimmer can swim with a speed of 1.0 m/s relative to the water), How long does it take the swimmer to cross the river
You do 220 J of work pulling your sister back on a swing, whose chain is 5.00 m long, until the swing makes an angle of 30.0 degrees with the vertical, What is your sisters mass
A phototube has a stopping potential of 2.62 Volt when the cathode is illuminated with dichromatic light of 400 nanometers and 600 nanometers wavelengths. Find the maximum speed of the emitted photoelectrons
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An airplane flying horizontally at a constant speed of 200 m/s and an altitude of 500 m, drops a bomb with no initial vertical speed. Air drag is negligible. What is the speed of the bomb when it hits the ground
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A dog running in an open field has components of velocity v_x = 3.0 m/s and v_y = -1.2 m/s at time t_1 = 11.4 s. For the time interval from t_1 = 11.4 s to t_2 = 24.7 s, What is the magnitude of the dog's velocity
Two block each of 3.0 kg are held by strings. The upper string exerts a force F of 100 Newtons. find the force exerted by the lower string on the lower block
Calculate the buoyant force acting on you due to the air you displace. Evaluate the density of air at ground level
A Beryllium nucleus consists of 4 protons and 5 neutrons. What is the potential energy of the nucleus due to electrical forces
If forces of magnitude 4.00 N applied to each end of a spring cause the spring to stretch 3.80 cm from its relaxed length, How much work is done by the applied forces in stretching the spring 3.80 cm from its relaxed length
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