p1 motion - wikispaces acceleration.notebook 2 september 03, 2015 p1 motion calculating acceleration...

5
P1 Acceleration.notebook 1 September 03, 2015 What is acceleration? P1 Motion The acceleration of an object is a measure of how quickly its velocity changes. A train accelerates in a straight line from rest. As it does, its velocity increases. The brakes on this motorcycle are causing it to slow down. This is negative acceleration. Negative acceleration is often called deceleration.

Upload: hadieu

Post on 02-May-2018

222 views

Category:

Documents


2 download

TRANSCRIPT

Page 1: P1 Motion - Wikispaces Acceleration.notebook 2 September 03, 2015 P1 Motion Calculating Acceleration •Change in speed is measured in metres per second (m/s). ... P1 Acceleration.notebook

P1 Acceleration.notebook

1

September 03, 2015

What is acceleration?P1 Motion

The acceleration of an object is a measure of how quickly its velocity changes. 

A train accelerates in a straight line from rest. As it does, its velocity increases.

The brakes on this motorcycle are causing it to slow down. This is negative acceleration. Negative acceleration is often called deceleration. 

Page 2: P1 Motion - Wikispaces Acceleration.notebook 2 September 03, 2015 P1 Motion Calculating Acceleration •Change in speed is measured in metres per second (m/s). ... P1 Acceleration.notebook

P1 Acceleration.notebook

2

September 03, 2015

P1 MotionCalculating Acceleration

• Change in speed is measured in metres per second (m/s).

• Time taken is measured in seconds (s).• Acceleration is measured in metres per second per second (m/s2).

Page 3: P1 Motion - Wikispaces Acceleration.notebook 2 September 03, 2015 P1 Motion Calculating Acceleration •Change in speed is measured in metres per second (m/s). ... P1 Acceleration.notebook

P1 Acceleration.notebook

3

September 03, 2015

P1 Motion

A racing car accelerates from rest to a velocity of 27 

m/s in 2 seconds. What is its acceleration?

=   13.5 m/s2

The formula to calculate acceleration can also be written as: 

• a is acceleration, measured in m/s2.• v is the final velocity in m/s• u is the initial velocity in m/s• t is the time taken, measured in seconds (s).

Page 4: P1 Motion - Wikispaces Acceleration.notebook 2 September 03, 2015 P1 Motion Calculating Acceleration •Change in speed is measured in metres per second (m/s). ... P1 Acceleration.notebook

P1 Acceleration.notebook

4

September 03, 2015

A race horse accelerates from 6 m/s to a speed of 12 m/s in a time of 4 seconds. What is the horse’s acceleration?

P1 Motion

=  1.5 m/s2

A hungry cheetah spots a gazelle and decides to chase it. The cheetah accelerates at 10 m/s2 from rest until it reaches 20 m/s. How long did this take?

=   2 s

Page 5: P1 Motion - Wikispaces Acceleration.notebook 2 September 03, 2015 P1 Motion Calculating Acceleration •Change in speed is measured in metres per second (m/s). ... P1 Acceleration.notebook

P1 Acceleration.notebook

5

September 03, 2015

Pople page 27 Q’s 5‐9.

P1 MotionAssignment