Why the Newton's second law of motion important?
Newton's Second Law of Motion F=ma is very important because it shows the relationship between forces and motion. It allows you to calculate the acceleration (and therefore velocity and position) of an object with known forces.
This is incredibly valuable for scientists, engineers, inventors, etc. By controlling, measuring, or calculating the force exerted on objects, we can map out their trajectory, thus knowing where they will be at any given time.
SG
Related Physics A Level answers
All answers ▸What does the photoelectric effect demonstrate?
Ignoring air resistance, use an energy argument to find the speed of a ball when it hits the ground if it is dropped from 50m, where m is the mass of the ball.
Hydrogen has a single proton and a single electron. Find the electric potential at a distance of 0.50 * 10^(-10) (m) from the proton.
On the line of centres between the Earth and the Moon, there is a point where the net gravitational force is zero. Given that the distance between the two is 385,000 km, and that the Earth has a mass 81x that of the Moon, how far is this point from Earth?