# What is the name of Newton’s second law?

### What is the name of Newton’s second law?

The second newton’s law : the dynamic This law is also called the Fundamental Principle of Dynamics (PFD).

### How to show that the motion of the earth is uniform?

We have therefore shown that if the movement of a planet is circular, then it is uniform. So it has the expression: aP = – v²/R. USP. (see the course on the movement circular).

### Why is Earth’s motion uniform?

The acceleration of the center of inertia of the planet earth is radial, centripetal and independent of the mass of the planet itself. However, in the Frenet base, a_{t}=\frac{dv}{dt}=0. This implies that the speed of the planet is constant. the movement is so circular and uniform.

### Why is the movement of the planets around the Sun called circular and uniform?

Around the Sunthem planets describe more or less orbits flyers at an almost constant speed. Simplifying, we can say that their movement is circular and uniform. Most of planets also have a movement of rotation uniform on themselves.

### How to calculate the vector sum of the forces?

❯ When multiple strengths are exerted on a system, one defines the vector resulting from strengths F resultant. the vector resulting from strengths F resultant is equal to the sum of forces that apply to the system. We can therefore also write it more simply ΣF .

### What is Newton’s third law called?

The newton’s third law explains the principle of action-reaction: when a body A exerts a force on a body B, body B will exert a force on body A of the same magnitude, but in the opposite direction.

### How to show that the motion of the Earth is uniform?

We have therefore shown that if the movement of a planet is circular, then it is uniform. So it has the expression: aP = – v²/R. USP. (see the course on the movement circular).