Kinematics Logger Pro Worksheet

Topics: Classical mechanics, Derivative, Cursor Pages: 12 (2094 words) Published: March 11, 2015
Kinematics: Real life video analysis using Logger Pro 3
Name: ___________________________ Class: 15S_________ Date: ______________ _________________________________________________________________________

In this exercise, we will be using the software “Logger Pro” to investigate the motion of an object in the following scenarios.
1. An object sliding down an inclined slope.
2. A ball projected at an angle (projectile motion).
3. A cupcake paper holder dropped vertically (air resistance). There are two worksheets which you need to complete for this exercise. Worksheet A – to be completed as homework before lab session Worksheet B – to be completed during the lab session

You will have to hand in both worksheets after the lab session. Before the lab session:
1. Complete Worksheet A
During the lab session:
You will carry out the lab session in groups of 3 – 5.
Individually, you need to bring:
1. Completed Worksheet A
2. Worksheet B
As a group, you will need to have with you:
1. A school laptop issued to you.
2. At least one smartphone with video recording function. The format of the video file must be playable using QuickTime (example, .mov or .mp4).
3. Make sure you can connect to the school’s Wi-Fi as you will need to send the video to the laptop via email.

1

Worksheet A (to be completed as homework prior to lab session) Scenario 1
An object slides down an inclined slope from rest. The slope is at an angle of θ to the horizontal.

+
+

inclined
slope

θ
Based on what you have learnt, answer the following questions. Take upward and rightward as positive.
1. Sketch a graph to show how the horizontal velocity (vx) varies with time (t). vx

t
2. Sketch a graph to show how the vertical velocity (vy) varies with time (t). vy

t

2

3. State an expression for the acceleration of the object along the slope. ………………………………………………………………………………………………

Scenario 2
A ball is projected at an angle and allowed to bounce on the floor 2 - 3 times. +
+

ball

floor
Based on what you have learnt, answer the following questions. Take upward and rightward as positive.
1. Horizontal motion (x-direction)
a. Sketch a graph to show how the horizontal velocity (vx) varies with time (t). vx

t
b. What is the value of the horizontal acceleration? State your assumption(s). ……………………………………………………………………………………………… ………………………………………………………………………………………………

3

2. Vertical motion (y-direction)
a. Sketch a graph to show how the vertical velocity (vy) varies with time (t). vy

t

b. What is the value of the vertical acceleration when the ball is in mid-air? ……………………………………………………………………………………………… Scenario 3

metre rule

h

A cupcake paper holder is released from rest at a certain height h.

4

Based on what you have learnt, answer the following questions. Take upward as positive. 1. Sketch a graph to show how the vertical velocity (vy) varies with time (t) vy

t

2. Describe the motion of the paper holder during the fall based on your graph. ……………………………………………………………………………………………………..... ………………………………………………………………………………………………………. 3. If the cupcake holder is now crushed into a paper ball and is released from the same height h, how would the vy – t graph be different? Explain. ……………………………………………………………………………………………………..... ……………………………………………………………………………………………………….

5

Worksheet B (to be completed during lab session)
Section A – Video recording of scenarios 2
Before carrying out the video analysis using Logger Pro, you first need to video record the motion of the object according to scenario 2. The videos for scenarios 1 and 3 will be provided to you via Learning@Meridian.

Scenario 2

metre rule

1. Clamp a metre rule in the background using a retort stand. The metre rule is used as a distance calibration object for the Logger Pro software.
2. Get your friend to project the ball at an angle upwards such that the ball is able to bounce 2 – 3 times off the ground while it is still within the...
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