# Shared Flashcard Set

## Details

Chapter 3
Linear Motion
11
Physics
09/15/2012

Term
 How is an arc created?   ______ will only go as fast as the initial force makes it go; it can't go faster.   ________ slows down as it gets to the top of the arc. The only force acting on it is ________. When it reaches the top of the arc, its acceleration reaches ________.
Definition
 a simultaneous up and down motion   horizontal component   vertical component gravity zero vertically
Term
 Motion is _____.   What is the formula for speed?   ________ shows the speed at a given time. In a car it is measured by _______.   What is the formula for average speed?   What is the formula for instantaneous speed?   What is the formula for distance?   What is the formula for acceleration?   What is the formula for velocity aqcuired in free fall from rest?   What do you round gravity to?   What is the formula for distance fallen in free fall from rest?
Definition
 relative   speed=distance/time   instantaneous speed; the speedometer   average speed=total distance covered/time interval   instantaneous speed=acceleration*time   distance=average speed*time   acceleration=change in velocity/time interval   v=gt   10 m/s^2   d=(1/2)gt^2
Term
 ____ is a number; ex. temperature, fever, speed, and can be positive or negative.   _____ have a speed and directional component attatched to it.   The magnitude is the _______.   Constant speed is different from constant velocity because velocity involves ______.   It is (impossible/possible) to have constant speed and constant velocity. Give an example.
Definition
 scalar   vector quantities   scalar   direction   possible; Racecar constantly going 100 mph on a circular track.
Term
 What is speed? (2)   What is velocity?   What is acceleration?   What is free fall?   What is the formula for acceleration along a straight line?
Definition
 How fast something moves. The distance traveled per unit of time.   The speed of an object and specification of its direction of motion.   The rate at which velocity changes with time in either direction, magnitude, or both.   Motion under the influence of gravity only.   acceleration (along a straight line)=change in speed/time interval
Term
 What is instantaneous speed?
Definition
 The speed of an object at any instant.
Term
 What is velocity?   What is acceleration?   What is the opposite of acceleration?   Can you accelerate even if your constant speed doesn't change? If yes, give example.
Definition
 Speed in a given direction.   How quickly velocity changes.   decceleration   yes, driving in a circle changes velocity and therefore causes acceleration
Term
 Who developed the concept of acceleration and with what experiment?   The greater the ______ the greater the acceleration.
Definition
 Galileo; inclined planes   incline
Term
 Free fall acceleration is due to ______.   When you throw a rock in the air and it has reached its highest point, what is its instantaneous speed? It slows as it rises by _______.
Definition
 gravity   zero 10 m/s^2
Term
 The distance traveled by an accelerating object is proportional to ______.   Who discovered this?
Definition
 the sqaure of time   Galileo
Term
 Explain why it is scientifically impossible for a person to jump more than 2 feet high.   What is the formula for hang time?
Definition
 The only applied force is the one when your feet are touching the ground.   hang time=√[(distance*distance)/gravity]
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