Transcript Velocity and Acceleration

Velocity and Acceleration
Ch. 2 Pg. 40 - 69
Objectives
 Describe and analyze motion in one dimension
using equations for acceleration.
 Understand the relationship between
acceleration, displacement, time, and velocity.
Velocity with Uniform Acceleration
vf = vi + aΔt
 Example:
A plane starting at rest at one end of a runway
undergoes a uniform acceleration of 4.8 m/s2 for 15 s
before takeoff. What is the plane’s speed at takeoff?
Displacement with Uniform Acceleration
Δx = viΔt + ½
2
aΔt
 Example
How long must the runway be for the plane to takeoff?
A car with an initial speed of 31.4 km/h accelerates at a
uniform rate of 1.2 m/s2 for 1.3 s. What is the final
speed of the car? What is the displacement of the car?