Chapter 9 - Acceleration Flashcards
What is change in velocity?
Occurs when speed of object changes or it’s direction changes or both.
V= Vf - Vi
What is acceleration?
Rate of change in velocity
Acceleration is speeding up. Positive or negative?
Positive
Acceleration is slowing down. Positive or negative?
Negative
What is positive acceleration?
If a car has forward velocity and forward acceleration
What is negative acceleration?
If the acceleration is backward but the velocity is forward then it is negative acceleration
What is another word for negative acceleration?
Deceleration
If a car is speeding up backwards, it’s sign is..?
Negative
If a car is speeding up forwards, the sign is..?
Positive
What information does a velocity time graph give?
An objects velocity and acceleration
What is constant acceleration and how is it shown on a velocity time graph?
Constant rate and motion. Shown by a straight line.
What is average acceleration?
Slope of velocity time graph
What is air resistance?
Friction-like force that opposed the motion of objects that move thru air
What is the value of Acceleration due to gravity?
-9.8m/s2
