An elevator is accelerating vertically upwards at . A man of mass is standing inside. Determine the reaction force of the floor on the man.
A body of mass 75 kg was attached to a string fixed to the ceiling of an elevator. Starting from rest, the elevator began accelerating vertically upwards at 44 cm/s2. During this time the tension in the string was . After accelerating, the elevator continued moving at the speed it had gained, at which point the tension in the string was . Finally, the elevator decelerated at 24 cm/s2, at which point the tension in the string was . Determine the magnitudes of , , and . Consider the acceleration due to gravity to be 9.8 m/s2.
A body of mass 130 kg was placed on the floor of an elevator of mass 761 kg. The elevator ascended from rest and it covered 15 m while accelerating uniformly. Following this, it continued moving at the speed it had gained for a certain distance. Finally, it decelerated uniformly for 5 seconds over a distance of 10 m until its speed became 1 m/s. Find the force of the elevator’s motor when the elevator was accelerating upwards and the magnitude of the reaction exerted on the body by the floor of the elevator during the third stage of the motion. Take .