Simulation to teach velocity speed and acceleration for physics lesson in SLS
Channel: Open Source Physics Singapore / Tracker / TagUI
Date: 04/07/2022

In the question, we will try to interpret a velocity - time graph. 
 
There are two pieces of content that you need to know:
(I will explain how these are derived in the next lesson)
The acceleration is given by the gradient of the V-T graph
The displacement is given by the area between the line and the x-axis
 
Answer the following question with reference to the following Velocity-Time graph. 
 
The motion of a ball is recorded on the velocity-time graph below.

Catalogue
https://iwant2study.org/ospsg/index.php/interactive-resources/physics/02-newtonian-mechanics/01-kinematics/655-kinematicsfukwun

Simulation
https://iwant2study.org/lookangejss/02_newtonianmechanics_2kinematics/ejss_model_Kinematicsfukwun/Kinematicsfukwun_Simulation.xhtml

Q1: 00:00 - 02:02  Between t = 0 s and t = 8 s, which section of the motion has a higher acceleration? Answer is t = 5.0 to 8.0 s
Q2 02:03 - 03:02 When does the ball make a U-turn and travel in the opposite direction? Answer is t = 15 s
Q3 03:03 - 03:52 Which section if the car undergoing deceleration? Answer is t = 8.0 to 15 s
Q4 03:53 - 04:00 Which section of the ball is undergoing negative acceleration? Answer is t  = 8.0 to 18 s
Q5 04:01 - 04:38 By comparing your answer in (c) and (d), describe a difference between deceleration vs negative acceleration.  Answer is deceleration is decrease in speed while negative acceleration is negative value of acceleration. 
Q6 04:39 - 5:11 Calculate the acceleration at t = 2.0 s. answer is a = 0.4 m/s^2, the gradient at t =2 happens to be the same as from t = 0 to 5 so it is easy to find.

SLS Lesson Sec 4 Math and Physics
https://vle.learning.moe.edu.sg/mrv/community-gallery/lesson/view/369c7fc0-dfb4-40b8-b770-95deb46c1c0b/cover