Formulas
The formula for density is this.
What is mass ÷ volume?
This is the main difference between speed and velocity.
What is direction?
This is Newton’s First Law also called.
What is the Law of Inertia?
A 10 N force applied to a 5 kg object produces this acceleration.
What is 2 m/s²?
This is Newton’s Third Law stated simply.
What is “For every action, there is an equal and opposite reaction”?
The formula for speed is this.
What is distance ÷ time?
A runner travels 100 m in 20 s. Their speed is this.
What is 5 m/s?
This is why passengers lurch forward when a bus stops suddenly.
What is inertia (an object in motion wants to stay in motion)?
If you double the mass of an object while keeping the force the same, this happens to the acceleration.
What is it is cut in half?
When you bounce a basketball on the ground, the ball returns upward because of this.
The ground pushes back on the ball with equal force.
This is the formula for velocity.
What is displacement ÷ time.
A bike increases velocity from 4 m/s to 12 m/s in 2 s. This is its acceleration.
What is 4 m/s²?
This property of an object determines how much inertia it has.
What is mass?
This is the metric unit of force.
What is a Newton?
This is the reaction force when a rocket pushes gases downward.
What is the gases push the rocket upward?
This is the formula for Newton’s Second Law.
What is F = m × a?
On a distance–time graph, a horizontal line means this.
What is no motion (the object is at rest)?
This explains why a soccer ball eventually stops rolling, even though Newton’s First Law says objects in motion stay in motion.
What is friction?
A 50 N force accelerates a cart at 10 m/s². This is the cart’s mass.
What is 5 kg?
Describe the action and reaction forces when you kick a soccer ball.
You kick the soccer ball and the ball has an equal force back on your foot
This is the formula for acceleration
What is (final velocity - initial velocity) ÷ time
On a velocity-time graph a upwards sloped line means this.
What is the object is accelerating?
This is why a magician’s dishes stay when they pull the tablecloth quickly.
What is inertia (an object at rest wants to stay at rest)?
A car with a mass of 1,000 kg accelerates from rest to 20 m/s in 10 seconds. Using Newton’s Second Law, calculate the net force acting on the car.
What is 2,000 N?
Describe the action and reaction forces when a swimmer pushes water backward during a race.
When you push the water backward, the water pushes you forward