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a 90 kg man drops from rest on a diving board 3 meters above thesurface of the water and comes to rest 0.59seconds after reachingthe water. the acceleration due to gravity is 9.81 meters persecond squared. what force does the water exert on the man? answerin units of newtons.
The moon orbits the earth at a distance of 3.85 x 10^8 m. Assume that this distance is between the centers of the earth and the moon and that the mass of the earth is 5.98 x 10^24 kg. Find the period (in days) for the moon’s motion around the earth.
a roller coaster had an intial velocity of 80 ms and abruptly came to a stop at the end of the ride. it took 10 seconds
An air-track glider is attached to a spring. The glider is pulled to the right and released from rest at t =0s . It then oscillates with a period of 1.50 sand a maximum speed of 36.0 cm/s. What is the amplitude of the oscillation? What is the glider'..
A ball is fired at an angle of 45 degrees from ground level in the absence of air resistance. If the maximum range is 27m then what is its inital speed and what is the time of flight
A 95-{rm m}-long train begins uniform acceleration from rest. The front of the train has a speed of 25 {rm m/s} when it passes a railway worker who is standing 120m from where the front of the train started. What would be the speed of last car as ..
A bird sits on a high-voltage power line with its feet 5.2 cm apart. What is the potential difference between the bird's feet
you ar charged to work on reducing expenditures for a company.you think that the company can save considerable money on fuel costs by lowering the room temperature of the building for daily use, How much heat will be saved each morning
A spherical Christmas tree ornament is 3.84 cm in diameter. What is the magnification of the image of an object placed 11.1 cm away from the ornament
What is the phase difference in a Young's double slit experiment where the intensity is half that of the central maximum
Cart A, with a mass of 2 kg, travels on a horizontal air-track at 3 m/s and hits cart B, what is the speed of the center of mass of the two-cart system
A 3.7 kg block of copper at a temperature of 86°C is dropped into a bucket containing a mixture of ice and water whose total mass is 1.2 kg. How much ice was in the bucket before the copper block was placed in it
The potenial energy for the force between two atoms in a diaomic molcules a-b has he approximate form v(x)= (-a/x^6 )+ (b/x^12), find the frequancy for small vibration
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