Application of the Newton’s law of the motion in an elevator – problems and solutions

1. A 50-kg person in an elevator. Acceleration due to gravity = 10 m/s2. Determine the normal force exerted on the object by the elevator, if : (a) the elevator is at rest (b) the elevator is moving downward at a constant velocity (c) elevator accelerated upward at a constant acceleration 5 /s2 (d) elevator …

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Motion on the rough inclined plane with the friction force – application of Newton’s law of motion problems and solutions

1. Object’s mass = 2 kg, acceleration due to gravity = 9.8 m/s2, coefficient of the static friction = 0.2, coefficient of the kinetic friction = 0.1. Is the object at rest or accelerating? If the object is accelerated, find (a) the net force (b) magnitude and direction of the box’s acceleration! Solution Known : …

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Motion on the inclined plane without the friction force – application of Newton’s law of motion problems and solutions

1. Box’s mass = 2 kg, acceleration due to gravity = 9.8 m/s2. Find (a) the net force which accelerates the box downward (b) magnitude of the box’s acceleration. Solution Known : Mass (m) = 2 kg Acceleration due to gravity (g) = 9.8 m/s2 Weight (w) = m g = (2)(9.8) = 19.6 Newton …

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Motion of two bodies with the same accelerations on the rough horizontal surface with the friction force – problems and solutions

1. Mass of the box 1 is 2 kg, the mass of the box 2 is 4 kg, acceleration of gravity is 10 m/s2, the magnitude of the force F is 40 Newton. The coefficient of the kinetic friction between the box 1 with the floor is 0.2 and the coefficient of the kinetic friction …

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Motion on the horizontal surface without the friction force – application of Newton’s law of motion problems and solutions

1. Mass of the object 1 is 2 kg, the mass of the object 2 is 4 kg, acceleration of gravity is 10 m/s2, the magnitude of the force F is 12 Newton. Determine the magnitude and direction of the objects’ acceleration. Known : m1 = 2 kg, m2 = 4 kg, g = 10 …

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