Force of Nature
____________________ is a measure of the change in the velocity or direction of a moving object.
Acceleration
An object with a greater mass will be harder to move than an object with less mass. Which of Newton's laws does this correspond to? Answer using a complete sentence without using "um" or "uh"!
This corresponds to Newton's second law.
________________ is the tendency of an object to resist a change in its motion.
Inertia
The mass of an object increases. What happens to its acceleration? (Assuming the force on the object is the same.) Answer using a complete sentence without using "um" or "uh"!
The acceleration of the object decreases.
Does a pick-up truck or a smart car have a greater gravitational force? EXPLAIN WHY. Answer using a complete sentence without using "um" or "uh"!
A pick-up truck has a greater gravitational force because objects with greater mass have more gravitational force.
Newton's Second Law uses the formula: F = ma
What do the variables represent?
force = mass x acceleration
If a car travels 120 kilometers in 2 hours, what is its speed?
60 kilometers per hour
What is gravity? Answer using a complete sentence without using "um" or "uh"!
Gravity is the attractive force that exists between all objects that have mass.
Gravity is the force that draws objects towards the center of the Earth.
What is Newton's third law? Answer using a complete sentence without using "um" or "uh"!
For every action, there is an equal and opposite reaction.
If the force on an object increases but the mass remains the same, what happens to acceleration? Answer using a complete sentence without using "um" or "uh"!
The acceleration of the object increases.
Paddling a canoe to make a boat move is an example of which of Newton's laws? Answer using a complete sentence without using "um" or "uh"!
This is an example of Newton's third law.
An __________________ force is required to overcome an object’s inertia.
unbalanced
What causes a ball that has been kicked across the ground to stop? Answer using a complete sentence without using "um" or "uh"!
The force of friction causes the ball to stop.
Pulling a tablecloth from a table and not disturbing the dishes on top is an example of which of Newton's laws? EXPLAIN WHY. Answer using a complete sentence without using "um" or "uh"!
This is an example of Newton's first law, because objects at rest are inclined to stay at rest unless a force acts directly on them.
What are the three forces on Earth that slow objects down or make them change direction? One of these forces pulls people to the center of the Earth, the other occurs sometimes with wind, and the other is a result of two objects rubbing together. List these forces!
1.) gravity
2.) air resistance
3.) friction
What is Newton's first law? Answer using a complete sentence without using "um" or "uh"!
Newton's First Law states that an object at rest will stay at rest, and an object in motion will stay in motion at a constant speed and in a straight line unless acted upon by an unbalanced external force.
What is Newton's second law? Answer using a complete sentence without using "um" or "uh"!
Newton’s Second Law states that the force acting on an object is equal to the mass of that object multiplied by its acceleration.
How is velocity different from speed?
Speed is the distance traveled per unit time, while velocity is the distance traveled per unit time and direction.