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Please Help: Which ones are true, and which are false?
1) The work required to lift a mass one meter depends on the speed at which it is raised.
2)The work done by a constant force acting on an object is equal to the magnitude of the force times the distance the object moves.
3) A particle's kinetic energy can change without having any net work done it.
4) The speed of an object is same in all inertial reference frames.
5)A simple machine cannot reduce the work required to do a task.
6) The power required to lift a mass does not depend on the speed at which the mass is raised.
1) The work required to lift a mass one meter depends on the speed at which it is raised.
2)The work done by a constant force acting on an object is equal to the magnitude of the force times the distance the object moves.
3) A particle's kinetic energy can change without having any net work done it.
4) The speed of an object is same in all inertial reference frames.
5)A simple machine cannot reduce the work required to do a task.
6) The power required to lift a mass does not depend on the speed at which the mass is raised.