Newton's 1st & 2nd Law of Motion

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 with the same speed and in the same direction unless acted upon by a net external force.

Front

What is Newton's 2nd Law of Motion?

Back

The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. This is often expressed as the formula: Force = Mass x Acceleration.

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 unit of force?

Back

The unit of force is the Newton (N).

Front

If a car accelerates from rest to 20 m/s in 5 seconds, what is its acceleration?

Back

Acceleration = (Final Velocity - Initial Velocity) / Time = (20 m/s - 0 m/s) / 5 s = 4 m/s².

Front

What happens to the acceleration of an object if the mass increases while the force remains constant?

Back

The acceleration decreases because acceleration is inversely proportional to mass (a = F/m).

Front

What is the relationship between mass and weight?

Back

Weight is the force exerted by gravity on an object and is calculated as Weight = Mass x Gravitational Acceleration (W = m x g).

Front

What is a net force?

Back

Net force is the total force acting on an object after all the forces are combined. It determines the object's acceleration.

Front

How does friction affect motion according to Newton's laws?

Back

Friction is a force that opposes motion. It must be overcome by a net force to change the motion of an object.

Front

What is an example of Newton's 1st Law in everyday life?

Back

When a car suddenly stops, passengers lurch forward due to inertia, as their bodies want to continue moving at the same speed.