How much time is required for an elevator to lift a 2000 kg load up 28 m from the ground level, if the motor can produce 13 kW o
1 answer:
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Answer:
(a) 0 (b)
Explanation:
Given that,
Mass of a supertanker,
The engine of a generate a forward thrust of,
(a) As the supertanker is moving with a constant velocity. We need to find the magnitude of the resistive force exerted on the tanker by the water. It is given by :
F = ma, a is the acceleration
For constant velocity, a = 0
So, F = 0
(b) The magnitude of the upward buoyant force exerted on the tanker by the water is equal to the weight of the ship.
F = mg
Hence, this is the required solution.