11/19/15 Flashcards
equations for speed
distance divided by time
equation for distance
speed times time
equation for time
speed divided by distance
equation for average speed
distance divided by time
equation for acceleration
final velocity - initial velocity divided by time
- A lizard accelerates from 2 m/s to 10 m/s in 4 seconds. What is the lizard’s average acceleration?
2
define motion
a change in position over time
define reference point; what kind of object serves as a good reference, bad reference
a location in which another location is compared;
define velocity
a speed in a specific direction
2 objects with same velocities
cars,rockets
Define VECTOR. Why is velocity an example of a vector?
a quantity that has both size and direction; velocity has a size, speed, and direction
define acceleration
a rate at which velocity changes over time
what are 3 ways an object can accelerate
1) acceleration in same direction as motion
2) acceleration on opposite direction of motion
3) acceleration at right angle to motion
What happens to an object that is accelerated in the SAME direction as its motion?
speeds up
What happens to an object that is accelerated in the OPPOSITE direction as its motion?
slows down
