What is meant by 'net force' in Newton's second law?

Net force is the vector sum of all forces acting on an object.

Define equilibrium in the context of forces acting on an object.

Equilibrium is when the net force on an object is zero, resulting in no acceleration.

9th Grade•59 minutes•NGSS HS-PS2-1

I can use Newton's laws to describe and predict the motion of objects.

Newton's first law describes inertia, which is an object's tendency to resist changes in its state of motion.

Newton's second law states that net force is equal to mass times acceleration, or F = ma.

Newton's third law states that for every action, there is an equal and opposite reaction, which explains the normal force.

This lesson includes 12 practice questions to reinforce learning.

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1. According to Newton's first law, what is inertia?

2. A bowling ball and a beach ball are the same size. Which has more inertia and why?

3. State Newton's second law of motion as an equation.

...and 9 more questions

Newton's Laws: Crash Course Physics #5

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