Vocabulary
Newton's Laws
Concepts
Equations
Applying Equations (Story Problems)
100
What is Mass? A. The amount of matter in an object; a measure of inertia B. The amount an object weighs
Correct Response: A - Mass is the amount of matter in an object; a measure of inertia
100
Which of Newton's laws states, "any object at rest will remain at rest unless acted on by an unbalanced force; an object in motion continues with constant speed and direction in a straight line unless acted on by an unbalanced force"?
Correct Response: Newton's 1st Law of Motion
100
A net force must be applied to an object to do all of the following EXCEPT: A. change direction B. slow down C. maintain constant speed
Correct Response: C - maintain constant speed
100
What is the equation used for finding/calculating Force?
Correct Response: F = ma (Force equals mass times acceleration)
100
An 800 kilogram rocket accelerates at 20 m/s^2. How large is the force required to cause this acceleration? (Hint: F = ma)
Correct Response: F = 800kg x 20 m/s^2 = 16,000Newtons
200
What do you call a force that pulls every mass toward every other mass? A. Friction B. Gravity C. Acceleration
Correct Response: B. Gravity
200
Which of Newton's laws states, "that whenever one object exerts a force on another, the second object exerts an equal and opposite force on the first"?
Correct response: Newton's 3rd Law
200
On the surface of the Earth, the acceleration due to the force of gravity is equal to: A. 6.5 m/s^2 B. 9.8 m/s^2 C. 9.8 kg D. 8.9kg m/s^2
Correct Response: B - 9.8 m/s^2
200
What does this equation mean? a = F/m
Correct Response: Acceleration equals Force divided by Mass (a = F/m)
200
Students at recess are having a tug-o-war. 3 students on one side each have a mass of 50 kilograms and another has a mass of 100 kilograms, will they be able to beat the other side which has 2 students who have a mass of 75 kilograms each and 2 more who each have masses of 80 kilograms? (Think about the online simulation) Why or Why not?
Correct Response: No - because the second side (other team) has a net force of 60 Newtons.
300
What is Weight? A. The amount of matter in an object - a measure of inertia B. The total of all the forces acting on an object C. A measure of the pulling force of gravity
Correct Response: C - A measure of the pulling force of gravity
300
What does Newton's 2nd law of motion state?
Correct Response: The acceleration of an object is directly proportional to the force on it and inversely proportional to its mass. F = ma
300
An astronaut is planning a trip to a newly-discovered planet. According to Newton's law of universal gravitation, the astronaut's weight on the new planet will be less than his weight on Earth if: A. The new planet has MORE mass than Earth. B. The new planet has LESS mass than Earth. C. The size of the planet does not matter because weight is the SAME EVERYWHERE in the universe.
Correct Response: B - The new planet has LESS mass than Earth.
300
What is the equation used for finding/calculating Momentum?
Correct Response: P = mv (momentum equals mass times velocity)
300
As a container is sliding down a slope, a 20 Newton force of gravity is pulling the container down the slope while a 5 Newton force of friction acts to stop the container. What is the net force accelerating the container down the slope?
Correct Response: The Net Force is 15 Newtons.
400
Name the force that always works against motion....
Correct Response: Friction
400
What causes a rocket to fly into space? A. When the gases are burning up, the mass of the rocket decreases, changing the gravity on the rocket. B. The rocket pushes the exhaust gases backward and there is an equal and opposite reaction pushing the rocket forward. C. When it is launched, the hot exhaust gases hit the ground and push the rocket forward.
Correct Response: B - The rocket pushes the exhaust gases backward and there is an equal and opposite reaction pushing the rocket forward.
400
If Miss Allnutt were to throw a volleyball and a tennis ball each with a force of 75 Newtons, which ball would have a faster acceleration? Why? A. Tennis Ball B. Volleyball C. They would be the same
Correct Response: A - Tennis Ball because it would have less air resistance (friction) and less mass.
400
What equation would I use to correctly solve the following problem? Problem: A 400 kilogram rocket accelerates at 50 m/s^2. How large is the force required to cause this acceleration?
Correct Response: F = ma (Force equals mass times acceleration)
400
A 500 kilogram rocket accelerates at 10 m/s^2. How large is the force required to cause this acceleration?
Correct Response: 500kg x 10 m/s^2 = 5000Newtons
500
Define Inertia:
Correct Response: Inertia is the tendency for an object to resist motion. Newton's first law - inertia is the property of mass. The greater the mass, the greater the inertia. The greater the inertia, the more difficult it is to move the object.
500
A binder sits on a table. The force of gravity pulls down on the book with a force of 10 Newtons. What prevents the book from accelerating downward at 9.8 m/s^2? A. The table presses back on the binder with an equal and opposite force of 10 Newtons. B. The table presses on the binder with a force greater than 10 Newtons. C. The table and the binder together are accelerating downward at 9.8 m/s^2.
Correct Response: A - The table presses back on the binder with an equal and opposite force of 10 Newtons.
500
What does the Law of Conservation of Momentum say?
Correct Response: As long as interacting objects are not influenced by outside forces, their momentum before the interaction will EQUAL momentum after. The momentum of two objects MUST BE EQUAL to each other BEFORE and AFTER a collision.
500
What equation would I use to solve the following problem? What is the answer to the problem? Problem: A tow truck pulls a 4,000 kilogram car with a net force of 12,000 Newtons. What is the acceleration of the car? Answer?
Correct Response: A = F/m (acceleration equals force divided by mass) Answer: 3 m/s^2
500
A boy and the skateboard he is standing on have a mass of 100 kilograms. He throws a 1 kilogram football forward at 5 m/s. At what speed will the boy roll backward? (Hint: Think about equal and opposite reactions)
Correct Response: 5m/s divided by 100kg = 0.05 m/s velocity
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