1&2
Why is physics the most basic science?
What is a resultant?
The sum of two vectors
Newton has this amount of laws.
What is three?
Which has a greater momentum, a heavy truck at rest or a moving skateboard?
Skateboard.
A wheel, carousel, planet, etc.
Math helps make ideas in science unambiguous
What is equilibrium?
When an object is at rest and the net force is zero
This is another word for newtons per square meter.
What is pascals?
Between impact & impulse, which is signified by forceXtime and which is signified by inertia in motion?
Impact- Inertia in motion
Impulse- ForceXtime
What is "center of gravity"?
The point located at the object's average position of weight.
What is the formula for velocity?
V= at
What is one example of a vector?
Name one: velocity, displacement, acceleration, force, momentum
A certain force applied to a 2kg mass accelerates the mass at 3m/s^2. How much acceleration will the same force produce on a 4kg mass?
1.5m/s^2
What is the difference between rotation & revolution?
Revolution- An object going around an external axis.
Rotation- An object going around an internal axis.
Distinguish between Stable, Neutral, and Unstable equilibrium
Stable- When an object is balanced so that its center of gravity is raised
Neutral- When an object is balanced so that its center of gravity remains unchanged
Unstable- When an object is balanced so that its center of gravity is lowered
What is the meaning of freefall?
When there is no air resistance affecting a free falling object
How does a vector quantity differ from a scalar quantity?
Vector has magnitude AND direction, scalar has only magnitude
What is Newton's Third Law?
Law of Conservation of Momentum, for every action there is an equal and opposite reaction.
When a car turns, does the seat belt provide centripetal force or centrifugal force?
Centripetal force
How far can an object be tipped before it topples over?
The object's center of gravity must be tipped beyond the base of the object.
Does air resistance increase, or decrease acceleration?
Decrease (but mostly just affects things like sweaters)
If forces of 10N and 15 N act in opposite directions on an object, what is the net force?
5N
In the interaction between a hammer and the nail it hits, is a force exerted on the nail? On the hammer? How many forces occur in this interaction?
Yes, Yes, 2
What is linear speed called when something moves in a circle?
Tangential speed
Why doesn't the Leaning Tower of Pisa fall over?
The center of gravity is located above the base of the tower.