Units & Uncertainty
The quantity that describes how close measured values are to the true value.
What is accuracy?
The measurement of the end point relative to the start point.
What is distance?
The quantity given by distance traveled divided by time.
What is (average) speed?
The derived SI unit for acceleration.
What is m/s2?
The primary assumption made in deriving the kinematic equations.
What is constant acceleration?
The conversion factor from g to kg.
What is 0.001 kg/g?
Of distance and displacement, the quantity that can be larger than the other.
What is distance?
An object's instantaneous velocity is calculated by finding the slope of this curve.
What is a position vs. time curve?
The quantity whose time-derivative gives an object's instantaneous acceleration.
What is (instantaneous) velocity?
The final velocity of a block accelerated from rest at a rate 0.5 m/s2 for 8 seconds.
What is 4 m/s?
The number of significant figures in 0.004050 .
What is four?
The distance traveled by a bus that drives 50 meters due east, and then 200 meters due west.
What is 250 meters?
The time it takes for a person to run 5 miles at a speed of 10 mph.
What is 0.5 hours?
For an object that is slowing down while moving in the negative direction, this is the sign of its acceleration.
What is positive?
A ball takes two seconds to fall when dropped from this height.
The formula for relative uncertainty in a quantity A.
What is δA/A * 100?
The displacement of a person who walks 10 meters south, then 7 meters north.
What is 3 meters south?
The displacement of a ball moving with velocity 15 m/s west for 3 seconds.
What is 45 meters west?
The time it takes for a toy car with acceleration 3 m/s2 to go from 0 m/s to 15 m/s.
What is 5 seconds?
The time it takes for a block traveling at 10 m/s to stop within 15 meters.
What is 3 seconds?
The units that variable b must have for this equation to be consistent: bv + x = at2.
[v]: m/s; [x]: m; [a]: m/s2; [t]: s
What is s (seconds)?
The difference between distance and displacement of a car that completes one loop around a square path with side lengths of 100 feet.
What is 400 feet?
The average velocity of a car that travels 50 miles north for an hour, stops for 15 minutes, then drives 30 miles south for 45 minutes.
What is 10 mph?
The acceleration of an object whose position is described by x(t) = 5t2 - 4t + 3.
What is a(t) = 10?
The displacement of a toy car decelerating from 4 m/s to 2 m/s at a rate of 2 m/ss.
What is 3 meters?