Newton's Second Law

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. It can be expressed with the formula: F = ma (Force = mass × acceleration).

Front

What is acceleration?

Back

Acceleration is the rate of change of velocity of an object. It occurs when an object speeds up, slows down, or changes direction.

Front

If a force of 20 N is applied to a mass of 5 kg, what is the acceleration?

Back

4 m/s² (using the formula a = F/m).

Front

What is the unit of force in the International System of Units (SI)?

Back

The unit of force is the Newton (N).

Front

How does mass affect acceleration when a constant force is applied?

Back

As mass increases, acceleration decreases when the same force is applied, according to Newton's Second Law.

Front

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

Back

The relationship is described by the equation F = ma, meaning force equals mass times acceleration.

Front

True or False: An object's velocity can be changed by changing its speed, its direction, or both.

Back

True.

Front

What happens to the acceleration of an object if the net force acting on it is zero?

Back

If the net force is zero, the object will not accelerate; it will either remain at rest or continue moving at a constant velocity.

Front

If a 6.0 kg object accelerates at 4.0 m/s², what is the force applied?

Back

24 N (using the formula F = ma).

Front

Which requires more force to change its motion: a heavier object or a lighter object?

Back

A heavier object requires more force to change its motion due to its greater mass.