To play online press the screenshot above and then the start button.

# Interactive Properties of Gravity.

 "Gravity Quiz" is a free online knowledge level game to solve 3 popular gravity mysteries. Physics exercise to explore and study gravity phenomenon. Fun educational game, suitable for online lessons and interactive classes. Free online game for physics homework. Online physics educational game. Fun physics quiz.

This physics class quiz include the following tasks:
• 1. There are 3 objects with different mass dropped from 10 feet height. Which one will hit the ground first?
A) The old TV
B) The piano
C) The shovel
D) All simultaneously

• 2. A bag of gold is dropped from an airplane. What will happen with its falling speed?
A) The falling speed will increase until the bag hit the ground.
B) The speed will increase for a while then remain constant until the bag hit the ground.
C) The speed will increase for a while then begin decreasing due to friction.
D) The falling speed will be all the same until the bag hit the ground.

• 3. Three kids with the exact same mass are situated on the beach, on mount Everest and deep under ground. Do they wåight the same?
A) All will weight the same.
B) The boy will weight more than the girls.
C) The girls will weight more than the boy.
D) The girl underground will weigh the most.

## How to play Gravity Quiz.

 On the right of the screen there is an interactive picture for every question. Like ordinary quiz you have to choose the correct answer to the question. Then an animation wil play to show the outcome. Make the exercise for new knowledge level.

Knowledge Achievements:
Know 3 interesting things about gravity and get +1 Knowledge Level.
Difficulty: Medium.

### Class subject: Gravity.

 Gravity or gravitation, is a natural phenomenon by which all things with mass or energy are brought toward (or gravitate toward) one another. On Earth, gravity gives weight to physical objects. Gravity has an infinite range, although its effects become weaker as objects get further away. Here are some interesting properties of gravity given in the answers of the quiz: 1. The gravity exert the same force on objects regardless of their mass. The only thing that can change the falling speed is the resistance of the fluid (or the air) they fall trough. But the height is not that big to allow friction to slow down the objects, so they all will hit the ground at the same time. 2. The bag will accelerate its speed untill it reaches a Terminal velocity. As the speed of an object increases, so does the drag force acting on it, which also depends on the substance it is passing through, for example air. At some speed, the force of resistance(drag force) will equal the gravitational pull on the object. At this point the object stops accelerating and continues falling at a constant speed called the terminal velocity. 3. The force of gravity changes with altitude. So the kid on mount Everest will weight approx 0.03 kg. less. But it also changes when going to the center of the earth. That means the kid deep underground will also weight less, becauce she experience gravity from all directions. If we reach the center of the earth we will actualy weight 0 kg.

This fun physics quiz may answer the following questions:
• Do falling objects increase their speed as they fall?
• Do all objects fall with the same speed?
• Does gravity depend on mass?
• How long does a falling object accelerate?
• Do we weight the same on different elevation?