Acceleration
Acceleration May-02-12 5:37 PM
Is this object travelling at constant velocity? What is happening to the movement of this object? Questions 1. What does it mean to accelerate? 2. What is the difference between something that accelerates quickly and something that accelerates slowly?
Acceleration is the change in velocity over time. (Deceleration is slowing down) Is acceleration a vector or a scalar? If my velocity increased, then I have Motion Page 1
positive acceleration (e.g. 6 m/s to 9 m/s)
If my velocity decreased, then I have negative acceleration (e.g. 34 km/hr to 12 km/hr) If my velocity doesn't change (i.e. constant velocity), then I have no acceleration. Question Is it possible to have a negative acceleration and a positive velocity? Examples?
Yes. Pulling the brakes on a car, parachuting, throwing a ball in the air, etc. We can also determine the acceleration of an object with its velocity-time graph:
v a t
Motion Page 2
v a t
Determines the slope of a velocity-time graph
• How will the slope of an object with constant velocity look like?
Is the object still moving? • The units for acceleration is m/s2. This means m/s per second or m/s/s Homework Read p. 380-386 Questions 1-10 on p. 391
Motion Page 3
Is this object travelling at constant velocity? What is happening to the movement of this object? Questions 1. What does it mean to accelerate? 2. What is the difference between something that accelerates quickly and something that accelerates slowly?
Acceleration is the change in velocity over time. (Deceleration is slowing down) Is acceleration a vector or a scalar? If my velocity increased, then I have Motion Page 1
positive acceleration (e.g. 6 m/s to 9 m/s)
If my velocity decreased, then I have negative acceleration (e.g. 34 km/hr to 12 km/hr) If my velocity doesn't change (i.e. constant velocity), then I have no acceleration. Question Is it possible to have a negative acceleration and a positive velocity? Examples?
Yes. Pulling the brakes on a car, parachuting, throwing a ball in the air, etc. We can also determine the acceleration of an object with its velocity-time graph:
v a t
Motion Page 2
v a t
Determines the slope of a velocity-time graph
• How will the slope of an object with constant velocity look like?
Is the object still moving? • The units for acceleration is m/s2. This means m/s per second or m/s/s Homework Read p. 380-386 Questions 1-10 on p. 391
Motion Page 3
