Forces

Front

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

Back

According to Newton's second law of motion, force (F) is equal to mass (m) multiplied by acceleration (a). This is expressed as F = m * a.

Front

What does the lowercase 'g' represent in physics?

Back

The lowercase 'g' represents the acceleration due to gravity, which is approximately -9.8 m/s² on the surface of the Earth.

Front

What is the normal force?

Back

The normal force is the force exerted by a surface that supports the weight of an object resting on it, acting perpendicular to the surface.

Front

How do you calculate weight?

Back

Weight (W) is calculated using the formula W = m * g, where m is mass and g is the acceleration due to gravity.

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 0.2 kg mass is hanging, what is its weight?

Back

Weight = mass * g = 0.2 kg * 9.8 m/s² = 1.96 N.

Front

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

Back

If the mass increases and the force remains constant, the acceleration decreases, as acceleration is inversely proportional to mass.

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 is the difference between mass and weight?

Back

Mass is the amount of matter in an object, measured in kilograms (kg), while weight is the force exerted by gravity on that mass, measured in Newtons (N).

Front

What is the formula for calculating gravitational force between two masses?

Back

The gravitational force (F) between two masses (m1 and m2) is calculated using Newton's law of universal gravitation: F = G * (m1 * m2) / r², where G is the gravitational constant and r is the distance between the centers of the two masses.