An elevator in a building can carry a maximum of 10 persons, with the average mass of each person being 68 kg. The mass of the elevator itself is 920 kg and it moves with a constant speed 3 m/s. The frictional force opposing the motion is 6000 N. If the elevator is moving up with its full capacity, the power delivered by the motor to the elevator (g = 10 m/s^2) must be at least :

An elevator of total mass (elevator + passenger ) 1800 kg is moving up with a constant speed of 2 m/s. A frictional force of 4000 N opposes its motion. Determine the minimum power delivered

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The elevator shown in figure is descending, with an acceleration of 2 m/s^2. The mass of the block A is 0.5 kg. The force exerted by the block A on the block B is -

A 4.0 kg block is suspended from the ceiling of an elevator through a string having a linear mass density of 19.2 * 10^-3 kg/m. Find the speed (in * 10 m/s) (with respect to the string in m/s)

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