NCFE Physical Science Practice

Front

What is momentum?

Back

Momentum is the product of an object's mass and its velocity, represented by the formula p = mv.

Front

How does momentum change during a collision?

Back

In a collision, the total momentum before the collision is equal to the total momentum after the collision, assuming no external forces act on the system.

Front

What is Newton's 1st Law of Motion?

Back

An object at rest stays at rest, and an object in motion stays in motion at a constant velocity unless acted upon by a net external force.

Front

What is the formula for calculating average speed?

Back

Average speed is calculated by dividing the total distance traveled by the total time taken, represented as Average Speed = Total Distance / Total Time.

Front

What is the difference between distance and displacement?

Back

Distance is the total path length traveled, while displacement is the shortest straight-line distance from the initial to the final position, including direction.

Front

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

Back

According to Newton's 2nd Law, force is equal to mass times acceleration (F = ma). This means that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.

Front

What is inertia?

Back

Inertia is the tendency of an object to resist changes in its state of motion. It is directly related to the mass of the object.

Front

What is the significance of a free-body diagram?

Back

A free-body diagram is a graphical representation used to visualize the forces acting on an object, helping to analyze the object's motion.

Front

What is the principle of conservation of momentum?

Back

The principle states that in a closed system, the total momentum before an event (like a collision) is equal to the total momentum after the event.

Front

How does mass affect the acceleration of an object?

Back

For a given force, an increase in mass results in a decrease in acceleration, as per Newton's 2nd Law (F = ma).