Newton's 1st Law
What is Newton's First Law also known as?
Law of Inertia
What is the mathematical formula for Newton's Second Law?
F = ma
For every action, there is an equal and opposite ______.
Reaction
Which of Newton's laws explains why passengers need seat belts when a car suddenly stops?
First Law
In which country was Isaac Newton born?
England
What happens to an object at rest if no net force acts on it?
It stays at rest.
What is the SI unit of force?
Newton (N)
If you push against a wall, what does the wall do to you?
It pushes back with an equal and opposite force.
Which law explains why pushing a heavier shopping cart requires more force to achieve the same acceleration?
Second Law
What fruit is famously associated with Newton's discovery of gravity?
Apple
What happens to a moving object if the net force acting on it is zero?
It continues moving at constant velocity.
A 3 kg object accelerates at 4 m/s². What is the net force acting on it?
12 N
When you walk, your feet push backward against the ground. What pushes you forward?
The ground
Which law explains how a swimmer moves forward by pushing water backward?
Third Law
In what year was Isaac Newton born?
1643 (modern Gregorian calendar; 1642 in the calendar used in England then)
Why does a hockey puck eventually slow down when sliding across ice?
Friction opposes its motion.
If the mass of an object doubles while the net force stays constant, what happens to its acceleration?
It decreases by half
Why don't action and reaction forces cancel each other out?
They act on different objects.
When a bus suddenly accelerates forward, passengers tend to lean backward. Which law explains this?
First Law
What is the name of Newton's famous book published in 1687 that introduced his three laws of motion?
Principia Mathematica
Two people push a box with equal forces in opposite directions. What is the net force acting on the box?
0 Newtons
A 4 kg object experiences a 30 N force to the right and a 10 N force to the left. What is its acceleration?
5 m/s² to the right
How can a rocket accelerate in outer space even though there is no air to push against?
It pushes exhaust gases backward, and the gases push the rocket forward.
A skydiver reaches terminal velocity and falls at a constant speed. What is the net force acting on the skydiver?
Zero (gravity and air resistance are balanced).
Which German mathematician independently developed calculus around the same time as Isaac Newton?
Gottfried Wilhelm Leibniz