What happens when unbalanced forces act on an object at rest?
the object begins moving in the direction of the net force
100
Gravity and magnetism are examples of what?
Non contact forces
100
What is terminal velocity?
the velocity of a falling object when the air resistance equals the force of gravity on that object
100
Where is Isaac Newton from??
He is from England
200
What happens when unbalanced forces act on an object in motion?
the object accelerates in the direction of the net force
200
What happens to the gravitational force between two objects as they move farther apart?
The gravational force decreases
200
What is mass?
mass is a property of a physical body which determines the body's resistance to being accelerated by a force
200
How many books did Isaac Newton write in his whole life?
7 books
300
According to Newton's first law, an object in motion will stay in what kind of motion as long as the net forces acting on it are zero?
constant motion in a straight line
300
The units of acceleration, m/s2, are equivalent to ...
N/kg
300
What causes a falling skydiver to slow down after the parachute opens?
air resistance
300
What is inertia
Inertia is the resistance of any physical object to any change in its state of motion, including changes to its speed and direction. It is the tendency of objects to keep moving in a straight line at constant velocity.
300
When was Isaac Newton born??
January 4, 1643
400
Andy is carrying a container full of water while walking through the kitchen. If he stops suddenly, will the water spill and if so why?
Yes, since the water will resist the change in the state of motion of the container.
400
For an object moving in a circle, what is the direction of centripetal force?
towards the center of the circle
400
Which type of friction keeps an object at rest?
static
400
What is friction?
Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other. There are several types of friction: Dry friction resists relative lateral motion of two solid surfaces in contact.
400
When did Isaac Newton die?
March 31, 1727
500
Why does the driver of a car appear to be pressed back in his seat when the car starts moving from rest?
Inertia causes an object at rest to remain at rest.
500
Which type of force(s) will cause a change in an object's motion?
unbalanced forces
500
What is the difference between weight and mass?
Mass is the amount of matter in an object, and weight is the gravitational force exerted on an object.
500
What is weight?
a body's relative mass or the quantity of matter contained by it, giving rise to a downward force; the heaviness of a person or thing.