By what factor does the kinetic energy change
Assume the mass of the object remains constant. (a) If the Kinetic Energy of an object changes by 1/3, by what factor has its speed changed? (b) If the speed is changed 1/3, by what factor does its Kinetic Energy change?
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(a) You throw the same stone with the same initial conditions but instead you do this on a another planet with a mass 4 times the mass of the earth. With what factor will x change?
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Indiana Jones is pushing back a 290 kg box of treasure which slides 4.6 m down a 27° incline and kept from accelerating. The effective coefficient of kinetic friction is 0.34 (a) Calculate the force (newtons) exerted by Jones.
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The braking distance of a car is 31m. If the speed of the car is increased by 40%, what is the car's new braking distance? (Assume the acceleration of the car is constant and independent of its initial speed.)
Determine overall efficiency of the pump-motor unit and the pressure difference between the inlet and the exit of the pump. Draw the process diagram.
A force of 5.0{\rm N} is required to stretch a certain spring by 1.5{\rm cm} . A. How far must this spring be stretched for its potential energy to be 0.025{\rm J} ?
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