- #1
asi123 said:Ok, I did the first one, came up with T2 = 8.736, is that right?
What is the net force?
How do I do the third one?
tiny-tim said:Shalom asi123!
Yes, your T2 is right!
The net force is the vector sum of all the forces.
(By Newton's second law, it will be equal to mass times acceleration.)
Just add all the forces (obviously, the vertical components cancel, so you only have to add the horizontal components )
The use the formula for centripetal acceleration to find the speed.
Newton's Laws of Motion are a set of three physical laws that describe the behavior of objects in motion. They were developed by Sir Isaac Newton in the 17th century and are considered fundamental principles in classical mechanics.
To solve problems involving Newton's Laws, you must follow a systematic approach. First, identify the known and unknown quantities in the problem. Then, draw a free body diagram to visualize the forces acting on the object. Next, apply Newton's Laws to set up equations and solve for the unknowns. Finally, check your answer and make sure it makes sense.
Newton's First Law, also known as the Law of Inertia, states that an object at rest will remain at rest and an object in motion will remain in motion at a constant velocity unless acted upon by an external force. Newton's Second Law, also known as the Law of Acceleration, states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. Newton's Third Law, also known as the Law of Action and Reaction, states that for every action, there is an equal and opposite reaction.
Some real-life examples of Newton's Laws include: a ball rolling down a hill (demonstrating the Law of Inertia), a rocket launching into space (demonstrating the Law of Acceleration), and a person pushing against a wall (demonstrating the Law of Action and Reaction).
Newton's Laws are important in everyday life as they help us understand the behavior of objects in motion and how forces affect them. They are also crucial in scientific research as they form the basis for many other laws and theories in physics, and are used to explain and predict the motion of objects in various scenarios, from simple everyday situations to complex astrophysical phenomena.