The force needed to accelerate an elevator upward at a rate of is 2000 N or 2 kN.
<u>Explanation:
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As per Newton's second law of motion, an object's acceleration is directly proportional to the external unbalanced force acting on it and inversely proportional to the mass of the object.
As the object given here is an elevator with mass 1000 kg and the acceleration is given as , the force needed to accelerate it can be obtained by taking the product of mass and acceleration.
So 2000 N or 2 kN amount of force is needed to accelerate the elevator upward at a rate of .
B. Closed because otherwise the energy would "escape"
Answer:how long it took him to get there
Explanation:
To develop this problem we will proceed to convert all units previously given to the international system for which we have to:
PART A ) From the given values the minimum acceleration will be given for 120Lb and maximum acceleration when 170Lb is reached therefore:
Through the Newtonian relationship of the Force we have to:
PART B) For the maximum magnitude of the acceleration downward we have that:
Through the Newtonian relationship of the Force we have to: