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Q. What should be the spring constant of a spring designed to bring a 1400 car to rest from a speed of 95 so that the occupants undergo a maximum acceleration of 5.0?
Q. A parallel-plate air capacitor is made from two plates 0.070 m square, spaced 3.5 mm apart. What must the potential difference between the plates be to produce an energy density of 0.067 J/m^3?
A ball is tossed from an upper story window of a building. Compute the height from which the ball is thrown.
Estimate the speed of the water just before striking the turbine blades (overlook air resistance).
A 12 kg mass starts from rest and slides down an inclined plane 8.0 10-1 m long in 0.9 s. What net force is acting on the mass along the incline?
In the 1950s, an experimental train that had a mass of 2.30 x 10^4 kg was powered across a level track by a jet engine that produced the thrust of 5.30 x 10^5 N for a distance of 504 m. unless otherwise directed, suppose that air resistance is neglig..
When a force of 19.0 N is applied to a spring, it elongates 0.0858 m. find out the period of oscillation of a 4.0 kg object suspended from this spring.
What will be the equilibrium temperature when a 223 g block of copper at 258 C is placed in the 178 g aluminium calorimeter cup containing 874 g of water at 13.2 C.
A proton is projected perpendicularly into a magnetic field that has a magnitude of 0.30 T. The field is then adjusted so that an electron will follow a circular path of the similar radius when it is projected perpendicularly into the field with t..
Find out the acceleration of the sled and child
A car moves from a point located 26.0 m from the origin and at an angle of 35.0 from the x-axis to the point located 57.0 m from the origin and at an angle of 60.0 from the x-axis in 2.52 s.
A piece of unpainted wood barely floats in a container partly filled with water. If container is sealed and then pressurized above atmospheric pressure, does the wood rise, sink, or remain at the similar level.
A shopper in a supermarket pushes a loaded 28 kg cart with a horizontal force of 12N. How far will the cart move in 3.5s, starting from rest.
If the perceived frequency becomes constant at 440 Hz, what is terminal speed at the paratrooper? Take the speed sound in air to be 343 m/s and assume the paratrooper always remains below the helicopter.
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