What physics is responsible for this dangerous compulsion?
The answer is in this chapter.
A jet plane taking off from an aircraft carrier is propelled by its powerful engines while being thrown forward by a catapult mechanism installed in the carrier deck. The resulting high acceleration allows the plane to reach takeoff speed in a short distance on the deck. However, that high acceleration also compels the pilot to angle the plane sharply nose-down as it leaves the deck. Pilots are trained to ignore this compulsion, but occasionally a plane is flown straight into the ocean.
5-1 What Is Physics?
We have seen that part of physics is a study of motion, including accelerations, which are changes in velocities. Physics is also a study of what can cause an object to accelerate. That cause is a force, which is, loosely speaking, a push or pull on the object. The force is said to act on the object to change its velocity. For example, when a dragster accelerates, a force from the track acts on the rear tires to cause the dragster’s acceleration. When a defensive guard knocks down a quarterback, a force from the guard acts on the quarterback to cause the quarterback’s backward acceleration. When a car slams into a telephone pole, a force on the car from the pole causes the car to stop. Science, ...