Forces & Motion_Newton's 2nd Law

Front

What is Newton's 2nd Law of Motion?

Back

Newton's 2nd Law states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. It can be expressed with the formula F = ma, where F is the net force, m is the mass, and a is the acceleration.

Front

What is a balanced force?

Back

Balanced forces are equal in size and opposite in direction, resulting in no change in motion. An object experiencing balanced forces will either remain at rest or continue to move at a constant velocity.

Front

What is an unbalanced force?

Back

Unbalanced forces are not equal and opposite, causing a change in the motion of an object. This can result in acceleration, deceleration, or a change in direction.

Front

What happens to an object in motion if no net force acts on it?

Back

If no net force acts on an object in motion, it will continue to move at a constant velocity, according to Newton's First Law of Motion.

Front

How does friction affect the motion of an object?

Back

Friction is a force that opposes motion. It can slow down or stop an object that is moving, depending on the magnitude of the frictional force compared to other forces acting on the object.

Front

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

Back

The relationship is defined by Newton's 2nd Law: the greater the force applied to an object, the greater the acceleration, provided the mass remains constant. Conversely, for a given force, a larger mass results in less acceleration.

Front

What is inertia?

Back

Inertia is the tendency of an object to resist changes in its state of motion. An object at rest stays at rest, and an object in motion continues in motion unless acted upon by an external force.

Front

What is the effect of increasing the mass of an object on its acceleration when a constant force is applied?

Back

Increasing the mass of an object while applying a constant force will result in a decrease in acceleration, as per the formula a = F/m.

Front

What is the net force?

Back

Net force is the vector sum of all the forces acting on an object. It determines the object's acceleration and direction of motion.

Front

What happens when two equal forces act in opposite directions on an object?

Back

When two equal forces act in opposite directions, they cancel each other out, resulting in a net force of zero, which means the object's motion remains unchanged.