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, where F is the force, m is the mass, and a is the acceleration.

Front

How do you calculate force using Newton's Second Law?

Back

Force can be calculated using the formula F = ma, where F is the force in newtons, m is the mass in kilograms, and a is the acceleration in meters per second squared.

Front

If a 20 kg cart is pushed with a force of 60 N, what is its acceleration?

Back

The acceleration can be calculated using the formula a = F/m. Here, a = 60 N / 20 kg = 3 m/s².

Front

What is the relationship between mass and acceleration in Newton's Second Law?

Back

According to Newton's Second Law, as mass increases, acceleration decreases for a given force. This means that heavier objects require more force to achieve the same acceleration as lighter objects.

Front

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

Back

The unit of force in the SI system is the newton (N). One newton is defined as the force required to accelerate a one-kilogram mass by one meter per second squared.

Front

How do you find the mass of an object if you know the force applied and the acceleration?

Back

You can find the mass using the rearranged formula m = F/a, where F is the force in newtons and a is the acceleration in meters per second squared.

Front

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

Back

If the net force acting on an object is doubled, the acceleration will also double, assuming the mass remains constant.

Front

What is the effect of friction on the application of Newton's Second Law?

Back

Friction opposes the motion of an object and must be accounted for when calculating the net force. The net force is the applied force minus the frictional force.

Front

If a car accelerates at 5 m/s² with a force of 20 N, what is its mass?

Back

Using the formula m = F/a, the mass is m = 20 N / 5 m/s² = 4 kg.

Front

What is the acceleration of a 6.0 kg object when a force of 24 N is applied?

Back

Using the formula a = F/m, the acceleration is a = 24 N / 6.0 kg = 4 m/s².