Newton's first law
How long do objects in motion stay in motion for?
Until an outside force changes their motion.
What is acceleration? Give two examples.
Acceleration is a change in the speed of an object. examples include speeding up, slowing down and turning.
For any pair of interacting objects, the force exerted by the first object on the second object is ____ in strength and _______ in direction.
equal, opposite
A push or a pull exerted on an object?
force
What is the acceleration due to gravity?
9.8 meters/second squared or rounded 10 meters per second squared.
Assuming no forces act on your book on the table, how long will the book remain at rest.
Forever, or until an outside force acts on it.
If the amount of force you push a grocery cart with remains constant, but you add more groceries into your cart, what will happen to the acceleration of your cart as you continue to shop?
acceleration will decrease
Define Newton's third law of motion.
For every action there is an equal and opposite reaction or forces always work in pairs and in opposite directions.
The force of attraction between objects containing mass.
Gravity
Why can't we feel the gravitational attraction of other things on the Earth?
The object's masses are to small to generate a force large enough for you to feel.
In our car and ramp model, what caused the speed of the marble to slow down?
The force of the ground and carpet pushing back on the marble.
If you increase the amount of force you use to push your grocery cart with, barring you don't add any groceries to the cart, then what will happen to the acceleration of the cart will?
increase
Describe how it is possible for you to walk backward?
You push down and forward on the floor, and the floor pushes you backward and up causing you to walk backwards.
The rate of change in the speed of an object.
acceleration
True of false, all objects that are made of matter have gravitational attraction.
True
In some classes the marble was faster on the carpet, what is one possible reason why it did?
Possible answers include timer error, releasing the marble from farther up the ramp, how the marble was released.
What part of your balloon car will collide with another object to produce the cars forward motion?
Wheels collide with the ground.
How much matter something is made of.
mass
According to Newton the Earth will move in a straight line unless an outside force changes it. Explain how it orbits around the sun?
The Earth moves in a straight line but gets pulled toward the sun by its gravity. As the Earth falls into the sun, the sun curves away from the Earth's path causing it to orbit.
If a person is a a car crash and is not wearing a seat belt, how will they move after the cars collide? Use evidence to support your claim.
The person will continue to move forward in a straight line at the same speed until something stops them. Evidence; Marble kept moving until the floor or carpet brought it to a stop.
How can understanding Newton's second law help you build a better balloon car?
Answers include: A balloon car with less mass will have a greater acceleration.
If we increase the air inside our balloon the wheels will exert a greater force on the ground causing a greater acceleration.
How do the wheels colliding with the ground cause the forward motion of your balloon car?
The wheels move down and back causing the car to go up and forward.
The distance traveled by an object divided by the time it takes for that object to move that distance.
speed
Explain why objects containing more mass fall at the same rate as objects that have less mass.
Objects with more mass have a greater force of attraction to the Earth.