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Two planes approach each other head-on. Each has a speed of 720 km/h , and they spot each other when they are initially 14.5s apart. How much time do the pilots have to take evasive action?
A person (body mass=72 kg) is taking off for a long jump. Ground reaction forces Fg,x = 250 N and Fg,z = 900 N. Calculate the resultant ground reaction force
A copper rod 81 cm long is used to poke a fire. The hot end of therod is maintained at 105° C and the cool end has a constanttemperature of 24° C. What is the temperature in degrees Celsius of the rod 23 cm from the cool end?
A cannon fires up at an angle 60 degrees above horizontal with a muzzle velocity of 60 m/s. What is the speed at the top of the cannonballs trajectory?
q1. a small metal sphere carrying a net charge of -2.70 is held in a stationary position by insulating supports. a
A block of mass m is initially at rest on a frictionless surface. At time t = 0, an increasing force given by F = kt2 is applied to the block. Find the velocity and the displacement of the block as a function of time and graph x and v versus t.
A heavier mass m1 and a lighter mass m2 are 19.0 cm apart and experience a gravitational force of attraction that is 9.20 10-9 N in magnitude. Determine the value of each individual mass
A vertical spring has one end attached to the ceiling and a 2.50-kg fish attached to the other one. How far down the fish will drop before starting to come back
A 0.300 kg glider is moving to the right on a frictionless, horizontal air track with a speed of 0.750m/s when it makes a head-on collision with a stationary 0.150 kg glider, Find the final kinetic energy of first and second glider
A 220-N sphere 0.20 m in radius rolls without slipping 6.0 m down a ramp that is inclined at 37 degrees with the horizontal. What is the angular speed of the sphere
During an earthquake, a house plant of mass 10.0 in a tall building oscillates with a horizontal amplitude of 12.0 at 0.30. What is the magnitude of the maximum velocity of the plant
A Wm = 890-N man sits on top of a stepladder of negligible mass that rests on a frictionless floor as shown in the figure below. Calculate the tension in the cross brace
A small moon of a giant planet has an orbital period of 1.43 days and an orbital radius of 4.69 multiply.gif 105 km. determine the mass of the planet
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