Please solve the questions below

Procedure:

• Go tohttps://phet.colorado.edu/en/simulation/gravity-and-orbits.
• Select Sun and Earth (top choice). Make sure to click Gravity Force, Velocity, and Path, and Gravity is checked On (like the diagram to the right).
• To answer Data+Analysis questions you should run several simulations, changing parameters as you go.
• Click the big blue Play arrow. Click the Fast Motion and Slow Motion arrows to see what affect they have. Use these two buttons as needed. Click the big blue stop button. Click the grey reset button in the upper right.

Data+Analysis:(50%, 5% for each question, provide short answers and clear)

1. What direction is the gravitational force of the orbiting objects? Make a sketch.

1. What direction is the velocity of the orbiting object? Make a sketch.

1. If you turn gravity off, what happens? Why does this happen?

Lab#4. Gravitational Force and Orbits Objectives: 1. Explore motion of planets, Moons and satellites. 2. Study how gravity is the force that controls the motion of our solar system. 3. Identify the variables that affect the strength of the gravity. 4. Predict how motion would change if gravity was stronger or weaker. Theory: (10%) Add the theory by yourself showing the formulas relevant to the lab content. Apparatus and methods: (10%) Add the objects and Tools involved in the experiment by yourself. Gravity: O on . off Gravity Force - Velocity - Path Grid E Star Mass 0.5 Our Sun 1.5 2. Planet Mass 0.5 Earth 1.5 2.0 . Fast Forward 742 Earth Days O Normal Slow Motion Clear Procedure