8 Sci - CPC4 Study Guide

Front

What are balanced forces?

Back

Balanced forces are forces that are equal in size but opposite in direction, resulting in no change in motion.

Front

What are unbalanced forces?

Back

Unbalanced forces are forces that are not equal and can cause an object to start moving, stop moving, or change direction.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that in a closed system, the mass of the substances involved in a chemical reaction remains constant; the mass of the reactants equals the mass of the products.

Front

How does mass affect the force required to lift an object?

Back

The greater the mass of an object, the more force is required to lift it, according to Newton's second law of motion (F=ma).

Front

What is velocity?

Back

Velocity is a vector quantity that refers to the speed of an object in a specific direction.

Front

How can you increase the strength of an electromagnet?

Back

You can increase the strength of an electromagnet by adding more coils of wire and increasing the current flowing through the wire.

Front

What is the difference between speed and velocity?

Back

Speed is a scalar quantity that refers to how fast an object is moving, while velocity includes both speed and direction.

Front

What is a force?

Back

A force is a push or pull acting upon an object, which can cause it to accelerate, decelerate, or change direction.

Front

What is Newton's second law of motion?

Back

Newton's second law states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass (F=ma).

Front

What is the role of magnets in an electric motor?

Back

Magnets create magnetic fields that interact with electric currents to produce motion in an electric motor.