A 10O0Kg elevator is hoisted upward from rest by a cable. In the first two seconds there is an 1100N tension force in the cable hoisting the elevator. What is the speed after two seconds and how far has it travelled ?
Get the acceleration first.
Tension=mg + m*acceleration.
solve for acceleration.
Then, vfinal=vinitial + acceleration*time
I didn't put numbers in as something is wrong with the mass (1000kg) or the force (1100N) numbers. A force of that magnitude wont support even a still elevator, much less move it upward.
Weight of elevator= mass*g...
Sorry it should have been 11000N. Yes i got the answer 2.4 m/s
Thank you for your help
Harry
please send me all Newton's Lows about physics
what are newton laws?
Newton's laws of motion are three fundamental principles that describe the behavior of objects in motion. Here are the three laws:
1. Newton's First Law of Motion (Law of Inertia): An object at rest will stay at rest, and an object in motion will stay in motion with the same speed and in the same direction unless acted upon by an external force.
2. Newton's Second Law of Motion (Law of Acceleration): The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. This relationship can be expressed as F = ma, where F is the net force applied to the object, m is the mass of the object, and a is the acceleration produced.
3. Newton's Third Law of Motion (Law of Action-Reaction): For every action, there is an equal and opposite reaction. In other words, whenever one object exerts a force on a second object, the second object exerts an equal and opposite force on the first object.
These laws form the foundation of classical mechanics and are still widely used to analyze and understand the motion of objects in the field of physics.