P2. Forces and Motion (Pre-Test)

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: Force = Mass x Acceleration.

Front

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

Back

You can calculate the mass using the formula: Mass = Force / Acceleration.

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

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

Back

The relationship is described by Newton's 2nd Law: Force = Mass x Acceleration. This means that for a given force, an increase in mass will result in a decrease in acceleration.

Front

What is mass?

Back

Mass is the amount of matter in an object, typically measured in kilograms (kg).

Front

What is acceleration?

Back

Acceleration is the rate of change of velocity of an object, indicating how quickly an object is speeding up or slowing down.

Front

If a 50 N force is applied to a 10 kg object, what is the acceleration?

Back

The acceleration can be calculated using the formula: Acceleration = Force / Mass. Therefore, Acceleration = 50 N / 10 kg = 5 m/s².

Front

What does it mean for an object to be in motion?

Back

An object is in motion if it changes its position relative to a reference point over time.

Front

What is the difference between speed and velocity?

Back

Speed is a scalar quantity that refers to how fast an object is moving, while velocity is a vector quantity that includes both speed and direction.

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.