2nd Law of Motion

Front

What is Newton's 2nd Law of Motion?

Back

Newton's 2nd Law of Motion 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 (Force = mass × acceleration).

Front

What is acceleration?

Back

Acceleration is the rate of change of velocity of an object. It is a vector quantity, meaning it has both magnitude and direction, and is measured in meters per second squared (m/s²).

Front

What is the formula to calculate force?

Back

The formula to calculate force is F = ma, where F is force, m is mass, and a is acceleration.

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What are the units of force?

Back

The units of force are Newtons (N). 1 Newton is defined as the force required to accelerate a 1 kg mass by 1 m/s².

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What is the relationship between mass and acceleration in Newton's 2nd Law?

Back

In Newton's 2nd 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.

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What is centripetal force?

Back

Centripetal force is the force that acts on an object moving in a circular path, directed towards the center of the circle. It is necessary for maintaining circular motion.

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What is the direction of acceleration for an object in free fall?

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The direction of acceleration for an object in free fall is downward, towards the center of the Earth, due to the force of gravity.

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How do you calculate acceleration?

Back

Acceleration can be calculated using the formula: a = (final velocity - initial velocity) / time.

Front

What is the relationship between force and acceleration?

Back

The relationship between force and acceleration is that an increase in force results in an increase in acceleration, provided the mass remains constant.

Front

What is the significance of the unit N/kg?

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The unit N/kg represents acceleration. It indicates that 1 Newton of force will accelerate a mass of 1 kg by 1 m/s².