Show:
Inertia
Newton's First Law
Newton's Second Law
Newton's Third Law
Velocity and Acceleration Word Problems
100
What is inertia?
An object's tendency to keep doing what it is doing
100
What is Newton's First Law? Give an example.
Newton's first law states that objects tend to keep doing what they are doing unless acted upon by an outside force.
100
What in Newton's Second Law? Give an example.
Newton's second law states that an object's acceleration is impacted by mass and force. F=ma.
100
State Newton's Third Law.
You got it!
100
What is speed? How does it differ from velocity? What are the units.
Speed is how fast something is going. Velocity is speed with direction. Units are distance/time.
200
Give an example of inertia.
Good One!
200
What are balanced forces? Give an example.
Equal but opposite forces No change in motion Net force is equal to zero
200
Define and state the units for each variable in Newtons Second Law.
Force = anything that causes an object to change speed (N) Mass = the amount of matter (or stuff) in an object (g) Acceleration = a change in speed (m/s2)
200
Why don't we always see an equal but opposite reaction between two objects? For example, when a mosquito collides with a car, is the force exerted on the car and mosquito equal? Why doesn't the mosquito and car react in the same way?
It's all about mass.
200
If an object is traveling at a speed of 20 m/hr and goes a distance of 100 m. How long will it take for the object to travel that distance?
5 hours
300
Do we see evidence of inertia on Earth? Think about objects in motion and objects at rest.
Yes and No. If objects are at rest, they do stay at rest. However, if objects are in motion, there are always forces that prevent the object from staying in motion. (gravity and friction)
300
What are unbalanced forces?
A force exerted in one direction is greater than the force in another direction. Net force is NOT zero. Results in a change in motion.
300
What is the relationship between acceleration and mass? Give an example. What is the relationship between acceleration and force? Give an example.
A and M have an indirect relationship. A and F have a direct relationship.
300
Explain the action - reaction between a bowling ball and a bowling ball pin.
Action force is bowling ball hitting pin. Reaction force is bowling pin pushing back on bowling ball. Pin has less mass, so shows more acceleration.
300
If an object is traveling at 30 m/s for 10 seconds, how far will it go?
300 m
400
Explain the relationship between mass and inertia. Give an example.
The more mass, the more inertia (and vice versa) Objects with more mass are harder to stop and are harder to set in motion. So, it is harder to get them to do something that they are not presently doing.
400
State four things that Newton accomplished.
universal gravitation reflecting telescope calculus geocentrism three laws of motion theory of color/light
400
If an object is accelerating at a rate of 2 m/s2, then how far will the object have traveled after 4 seconds?
20m
400
In our alka seltzer lab, explain the results for the bullet and the cannon.
Bullet moved less distance as mass increased. Cannon moved about the same distance because mass stayed constant.
400
If an object starts from a resting position and reaches a speed of 15 m/s in 3 seconds, what is it's rate of acceleration?
5 m/s2
500
Who discovered inertia and how?
Galileo. Galileo used ramps and marbles. He discovered that a marble dropped from a certain height always reaches the same height on the opposite ramp. If the angle of the ramp is decreased, the marble will need to travel farther to reach that height. If the angle is brought to zero, the marble can never reach that height and should travel forever.
500
Give an example of how four forces exerted on an object would not result in a change in motion.
You are correct!
500
Give two examples of how you might use Newton's Second Law when building your Balloon Car.
Yes!
500
Give an example of an action/reaction pair that would show the same change in motion and one that would not. Explain.
You've got it!
500
Draw a graph for an object that starts off at rest, then shows a slow constant positive acceleration, followed by a constant velocity, or zero acceleration, and then shows a fast constant negative acceleration.
Fantastic!