Newton’s Second Law. Objective ► At the end of today, you will be able to explain:  The greater the force exerted on the object, the greater the acceleration.

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Newton’s Laws of Motion

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Presentation transcript:

Newton’s Second Law

Objective ► At the end of today, you will be able to explain:  The greater the force exerted on the object, the greater the acceleration.  For any force, the greater the mass of an object, the smaller the acceleration. ► And the smaller the mass, the larger the acceleration.

Newton’s Second Law Newton's 2nd Law Animation

Newton’s 2 nd Law ► Shopping Cart Simulation-  What happens when more force is added to an object with the same mass?  What happens to the acceleration when the same force is applied to a larger mass?

What is the relationship between force and acceleration? ► The harder you push or pull something, the faster it will accelerate. ► Force and acceleration are directly proportional.  This means whatever happens to one quantity happens to the other.

What is the relationship between mass and acceleration? ► As the Mass goes up ► ► The Acceleration goes down

What is the relationship between mass and acceleration? ► Mass and acceleration are inversely proportional. ► That means if one increases, the other decreases.

Zero Net Force ► If there is zero net force, then a = 0.  F = ma ► However, an object can be moving even if there is zero net force on the object.  It is moving with a constant velocity ► Constant speed and constant direction (straight line) ► Velocity remains the same if there is no acceleration.

How does this picture demonstrate Newton’s 2nd Law?

Exit Ticket ► Johnny and Peggy Sue are each going to push a 25 kg weight plate. Johnny is going to apply a force of 50 N, and Peggy Sue is going to apply a force of 100 N. What is each person’s acceleration? Is there a difference between their accelerations? If so, explain why they are different. ► Remember: a=F / m

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