Question

A military airplane sometimes needs to refuel in mid-air, and another plane flies above it to add the fuel. If a plane with a mass of 7,800 kg is traveling with a velocity of 30 m/s and refuels by adding an additional 800 kg of jet fuel, what will its new velocity be? (Hint: This is a multi-step problem).

Answer 1

Explanation:

This showed that the real effect of a force is

always to change the speed of a body, rather than just to set it moving,

as was previously thought. It also meant that whenever a body is not

acted on by any force, it will keep on moving in a straight line at the

same speed. This idea was first stated explicitly in Newton’s Principia

Mathematica, published in 1687, and is known as Newton’s first law.

What happens to a body when a force does act on it is given by Newton’s

second law