Forces & Motion

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 = m * a.

Front

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

Back

The unit of force is the Newton (N), which is defined as kg*m/s².

Front

How do you calculate acceleration?

Back

Acceleration (a) can be calculated using the formula: a = F/m, where F is the net force applied and m is the mass of the object.

Front

What is inertia?

Back

Inertia is the property of an object to resist changes in its state of motion. It is directly related to the mass of the object.

Front

What does a Free Body Diagram (FBD) represent?

Back

A Free Body Diagram (FBD) is a graphical representation that shows all the forces acting on an object, helping to analyze the object's motion.

Front

What is the relationship between mass and weight?

Back

Weight is the force exerted by gravity on an object and is calculated as W = m * g, where g is the acceleration due to gravity (approximately 9.81 m/s² on Earth).

Front

What is the formula for calculating net force?

Back

Net force (F_net) is calculated by summing all the forces acting on an object: F_net = F_applied - F_friction - F_other.

Front

What is the significance of the direction of forces in motion?

Back

The direction of forces determines the direction of acceleration and thus the motion of the object. Forces in the same direction add up, while forces in opposite directions subtract.

Front

What is the difference between static and kinetic friction?

Back

Static friction is the force that keeps an object at rest, while kinetic friction is the force that opposes the motion of an object that is sliding.

Front

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

Back

When a constant force is applied, an increase in mass results in a decrease in acceleration, as per Newton's Second Law (F = m * a).