Lesson 10 — acceleration

• Science
• Middelbare school
• havo
• Leerjaar 2

4.4 Acceleration

This lesson

•  Recap acceleration
• Discussing the homework
• Rearranging the formula
• Speed-time graphs

Learning goals

• Name the formula for acceleration and apply it in calculations.
  
• Be able to rearrange the formula for acceleration.
  
• Define the unit of acceleration.
  
• Be able to read speed-time graphs
  

Discussing the homework

• The yellow block exercises of paragraph 4.4 (page 87)
  

Speed-time graphs

Speed-time graphs

What type of movement is shown at each part of the graph?

•  A: Steady acceleration
• B: Steady speed
• C Steady acceleration
• D: increasing acceleration
• E Decreasing acceleration

B

C

D

E

F

G

At what letter does the skydiver...

1. Open their parachute?
2. Reach terminal velocity (there are two moments)
3. Accelerate
4. Reach the ground
5. Decelerate
6. The skydiver jumps

A

• A car accelerates at a rate of 13m/s2 for 6 seconds, it reaches a speed of 128 km/h. Calculate its initial speed.
  

• A rocket launching  accelerates from rest a rate of 1.5 km/s2 for 8 seconds. Calculate the speed it reaches.

• A cyclist in the decelerates from 22 m/s to a speed of 37 m/s at a rate of 7,5 m/s2. Calculate the time this took.
  

Homework

• Worksheet acceleration Exercise 5, 6, 7, 8
  
• Read chapter 5 sound, paragraph 1
• Do the yellow block exercises of paragraph 5.1
• Do the workbook exercises of paragraph 5.1

Learning goals

• Name the formula for acceleration and apply it in calculations.
  
• Be able to rearrange the formula for acceleration.
  
• Define the unit of acceleration.
  
• Be able to read speed-time graphs