ICP 3.4,6: Newton's 2nd Law Calculations

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 force, m is mass, and a is acceleration.

Front

How do you calculate force using mass and acceleration?

Back

Force can be calculated using the formula: F = ma, where F is force in Newtons, m is mass in kilograms, and a is acceleration in m/s².

Front

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

Back

If the mass of an object increases while the force remains constant, the acceleration decreases.

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).

Front

If a net force of 20 N is applied to a 2 kg object, what is its acceleration?

Back

The acceleration can be calculated using the formula a = F/m. Here, a = 20 N / 2 kg = 10 m/s².

Front

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

Back

The relationship is defined by Newton's Second Law: Force equals mass times acceleration (F = ma). This means that for a given mass, an increase in force results in an increase in acceleration.

Front

If an object has a mass of 10 kg and accelerates at 15 m/s², what is the force applied?

Back

Using F = ma, the force is F = 10 kg * 15 m/s² = 150 N.

Front

What is the effect of increasing the force on an object?

Back

Increasing the force on an object results in an increase in its acceleration, assuming mass remains constant.

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 formula m = F/a, where F is the force and a is the acceleration.

Front

What is the acceleration of a 1,000 kg truck that comes to a stop in 0.5 seconds after hitting a wall?

Back

To find the acceleration, use the change in velocity and time. If the initial velocity is 10 m/s and final is 0 m/s, acceleration = (0 - 10 m/s) / 0.5 s = -20 m/s².