Chapters 1 & 2
What is free fall?
What is motion under the influence of only gravity
What is a vector
Magnitude and direction
What is acceleration?
The rate at which velocity is changing.
Does an inward or outward force act on the clothes during the spin cycle of an automatic washer?
Inward Force
Tendency of things to resist change in motion is
inertia
What is a motion only influenced by gravity?
What is a projectile
A cannon ball being shot out of a cannon is an example of what
Projectile
What is air resistance?
The friction acting on something moving through air.
Does a child on a merry-go-round revolve or rotate around the merry-go-round's axis?
The child revolves
An object balanced so that any displacement lowers its center of gravity is in...
What is Unstable Equilibrium
A projectile is an example of what?
What is a free falling object
How many Newtons is in 1 kilogram
9.8N
What is newton's second law?
The acceleration produced by a net force on an object is directly proportional to the magnitude of the net force.
What's the difference between linear speed and rotational speed?
Linear speed is distance covered per time, rotational is the number of rotations per time.
Why does the leaning tower of Pisa not topple over?
What is Its center of gravity is above its base
What is the difference between a vector & a scalar?
What is vector has magnitude (speed) & direction, scalar is just magnitude (speed)
What is the process of determining the component of a vector
Resolution
What is reaction force?
The force that is equal in strength and opposite in direction to the action force, which acts simultaneously on whatever is exerting the action force.
Distinguish elastic and inelastic collision.
While inelastic distorts and generates heat when objects collide, elastic doesn't permanently deform or generate heat.
When you carry a heavy load with one arm, why do you tend to hold your free arm out horizontally?
What is To balance out your center of gravity
What is the formula for acceleration?
What is "change of velocity/time interval"
What does the amount of inertia depend on?
Mass
What is Newton's 3rd law?
The law of conservation of mass.
What's the difference between impulse and momentum?
Impulse is the change of momentum depending on force/time, while momentum is inertia in motion.
Why do you fall over when attempting to touch your toes while your heels are against a wall?
What is Your center of gravity is not over your feet, causing you to fall over.