Unit 4 Summary

Front

What happens to an object when a force is applied while it is already moving?

Back

The object will move and speed up.

Front

What is the term for the constant speed reached by a falling object when air resistance balances the force of gravity?

Back

Terminal velocity.

Front

What happens to the acceleration of a person falling from a high altitude?

Back

It will decrease down to zero.

Front

What happens to an object that is not moving when a force is applied?

Back

The block will not move.

Front

If an effort of 200 newtons is applied to a pulley system, how much lifting force will it produce?

Back

400 newtons.

Front

Define force in the context of motion.

Back

Force is a push or pull that can cause an object to accelerate.

Front

What is the relationship between force, mass, and acceleration?

Back

According to Newton's second law, F = ma (Force equals mass times acceleration).

Front

What is air resistance and how does it affect falling objects?

Back

Air resistance is a force that opposes the motion of an object through air, affecting its acceleration and speed.

Front

Explain the concept of equilibrium in physics.

Back

Equilibrium occurs when all forces acting on an object are balanced, resulting in no acceleration.

Front

What is the difference between speed and velocity?

Back

Speed is a scalar quantity representing how fast an object moves, while velocity is a vector quantity that includes direction.