Activity 5.1A Investigating Gravity

1. Discuss: Is gravity a contact or a non-contact force? what evidence do you have?

2. Interact with 1. Science By Doing (login and then from index page)  5.1 - Zero Gravity  https://www.sciencebydoing.edu.au/curriculum/student/science-of-toys/digital/part5/activity1 

3. View video [3.21 mins] Upside Down

Practical 5.1A Effect of Gravity

http://stileapp.com/go/effectofgravity

 Method:

1. Weigh different balls on the electronic mass balance and record the mass (grams) in the table.

2. Select a height to drop the balls from.

3. Set up the video-recording device so that it is focussed where the balls will hit the ground.

4. Drop all four balls at exactly the same time from exactly the same height.

5. Review the video and record your observations.

Activity 5.2A

1. Analyse results for Robocopter

2. Write an experimental report

Activity 5.2C

Copy and complete:

Gravitational Force

9.8    Distance    Kilograms    Lower    Mass    Mass    Mass    Newtons    Pull   Push   Weight   Weight

1.          The m__________ of an object refers to the amount of matter contained in the object and is measured in k__________.

2.          The w__________ of an object is defined as the force of Earth’s gravitational pull on the object.

3.          Force is simply a p__________ or a p__________ which is measured with a unit called N__________.

4.          A person standing on the moon will have the same m__________ as on Earth but a different w__________ because the moon’s gravity is l__________ than Earth’s gravity.

5.          The force of gravity decreases as the d__________ between two objects increases.

6.          The greater the m__________ of an object, the greater its force of gravity.

7.          When an object falls from a height, its acceleration due to gravity is approximately __________ ms-2 (metres per second per second).