Mass
Velocity
Newton
Sir Isaac Newton
Gravity
100
This acts in a direction opposite to the direction of an object's motion.
What is Friction?
100
The resistance of a change in motion of an object that is at rest or moving, unless acted upon by a force.
What is Inertia?
100
A force that can cause an object's motion to change.
What is an unbalanced force?
100
The amount of matter in an object.
What is Mass?
100
Which of Newton's Laws states the relationship of mass, acceleration, and force by using this equation: Acceleration = Force divided by Mass
Newton's second law of motion?
200
The force that causes an object to move in a circle.
What is a centripetal force?
200
An object in free fall does this in order to reach its terminal velocity.
It slows down.
200
The measure of the force of gravity on an object.
What is weight?
200
Air rushing against an airplane is an example of what type of friction?
What is fluid friction?
200
The momentum of an object depends on its mass and what other thing?
Velocity.
300
This characteristic of a group of moving objects remains the same unless an outside force acts on the objects.
What is momentum?
300
True or False? Forces can be added together only if they are acting on the same objects.
True
300
True or False? According to Newton's second law of motion, velocity increases as force increases, if mass stays the same.
False: acceleration increases as force increases, if mass stays the same.
300
True or False? The force due to gravity is stronger if two objects are closer.
True
300
True or False? The force of friction acts between all objects in the universe.
False: the force of gravity acts between all objects in the universe.
400
True or False? A satellite in orbit around Earth is never falling toward Earth.
False
400
What happens when a rocket takes off? Explain the process that must occur in order for take off to be successful.
The rocket burns fuel and produces gas that push downward (action force) and at the same time the gas applies an equal reaction force on the rocket pushing it upward. The provided to the rocket must exceed the force of gravity in order for it to move upward.
400
Once a rocket is in orbit what keeps the rocket from falling back to the surface or moving off into space?
The centripetal force causes the rocket to fall towards the Earth in a circular motion and because the Earth is in orbit at the same time the rocket's inertia is balanced causing it to stay in orbit.
400
What forces are acting on you when you slide down a water slide? What type of friction is present? If the water slide were dry, would the amount of friction be different? Explain
Gravity is the force that pull you down the slide. Fluid friction occurs between water and the person. Sliding friction would exist if the slide was dry. Sliding friction is greater than fluid friction. The person may not go down the slide.
400
An astronaut throws a ball on the moon, where there is no air. At the same time someone throws a ball on earth using the same force. Which ball will travel a greater distance before it hits the ground? Explain.
The ball thrown on the moon will travel the greatest distance because there is no air resistance on the moon. The force of gravity is also greater on the ball that was thrown on earth. Air resistance and gravity decrease the distance a ball with travel here on earth.
500
Blowing up a balloon and holding the untied ends closed is an example of which of Newton's laws. Why?
This is an example of Newton's third law: Action/Reaction Pairs. The balloon will move away from the open end because the air that is released exerts a force on the balloon that pushes it away from the open end.
500
What is the law that states: the total momentum of any groups of objects remains the same, or is conserved, unless outside forces act on the objects.
Law of Conservation of Momentum.
500
What is the momentum of a 2000-kg car traveling at a velocity of 15 m/s?
30,000 kg-m/s Momentum = Mass x Velocity
500
The greatest velocity a falling object reaches is called its what?
Terminal velocity
500
What are the two factors that affect the gravitational attraction between objects?
Mass and distance. More mass = greater amount of gravity it takes to hold the object down. Farther apart an object is the lesser the gravitational force between them.
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