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Why do we still use Newtonian mechanics for studying motion today?
It is workable for most object within being overly complex
An airplane is flying west at 690 kph. The wind is blowing east at 60 kph. Add the two vectors to determine the final velocity.
630 kph west
An arrow shot from a bow that follows a curved path demonstrates ________________________ motion.
projectile
________________________ a scalar indicating how far an object has traveled
distance
________________________ a vector equal to velocity multiplied by mass
momentum
Even when you are sitting as motionless as possible, according to which frame of reference are you still moving?
The moon
What is the acceleration for objects in free fall near the surface of the earth?
9.81 m/s^2
In most cases, a projectile’s trajectory ________________________ follow a true parabola due to air resistance.
does not
________________________ a vector indicating change in position
displacement
________________________ a vector indicating the change in velocity per unit time
acceleration
While you are sitting on the ground, you see an airplane flying overhead. In that plane, a woman walks down the aisle of the aircraft. What is her frame of reference? What is your frame of reference?
the cabin of the airplane; the ground
The formula s = d/t is used for calculating ________________________.
average speed
A number line is a frame of ________________________.
reference
________________________ is always less than or equal to distance.
displacement
A vector consists of both ________________________ and ________________________
magnitude and direction
How can an object be accelerating even when its speed remains constant?
chasing direction or circular motion
When studying motion, we often identify a particular system rather than study ___________________ the possible motion.
all
________________________ a scalar indicating how quickly an object has traveled.
speed
Acceleration (is or is not) always in the same direction as velocity.
is not
What is centripetal acceleration?
acceleration towards the center of a circle
Momentum in a system is conserved when ________________________
the system is isolated
________________________ a vector indicating change in position per unit time
velocity
The motion of an object that falls due to gravity alone with no other forces acting on it is called ________________________.
free fall