Gravitational Force

Gravitational Force

Poll

When you are playing Volleyball, once the ball is tossed into the air, it will eventually come down. What could be the reason for that?

• I think it comes down because the earth pulls it down

• I think it comes down because it runs out of force

• I think it comes down because air pressure pulls it down

• I think it comes back down because no forces are acting on it

Open Ended

Can you push a pineapple off the table without touching it? How?

Removing the table will drop the pineapple to the ground

WHY?!

Gravitational Force

is an attractive force that exists between all objects that have mass.

Imagine yourself jumping on the moon!

If you jump too high, what might happen?!

Multiple Choice

Increasing the distance between the two objects will:

• Decrease the force of gravity

• Increase the force of gravity

If you throw a watermelon and a ping-pong ball from the top of a tower. Which object will hit the ground first?

Why?

Multiple Choice

Increasing the mass of an object will:

• Increase the gravitational force acting on it.

• Decrease the gravitational force acting on it.

What factors affect the strength of gravitational force?

• Distance

• Mass

Gravitational Acceleration

Acceleration of objects towards the center of the earth due to gravity.

Multiple Choice

What is the value of the Gravitational Acceleration on Earth?

• 9.8 m/s/s

• 9.5 m/s/s

• 7 m/s/s

What about the other planets in the solar system?

which planet do you think has the highest gravitational acceleration?

The Sun has a gravitational acceleration of 274 m/s/s

Jupiter has a gravitational acceleration of 24.92 m/s/s

Neptune has a gravitational acceleration of 11.15 m/s/s

The Earth has a gravitational acceleration of 9.8 m/s/s

Mars has a gravitational acceleration of 3.71 m/s/s

The Moon has a gravitational acceleration of 1.62 m/s/s

Multiple Choice

Which of the following has the highest Gravitational acceleration?

• The Sun

• Jupiter

• The Earth

• The Moon

Multiple Choice

Which of the following has the lowest Gravitational acceleration?

• The Sun

• Jupiter

• The Earth

• The Moon

Multiple Choice

When you are playing Volleyball, once the ball is tossed into the air, it will eventually come down. What could be the reason for that?

• I think it comes down because the earth pulls it down

• I think it comes down because it runs out of force

• I think it comes down because air pressure pulls it down

• I think it comes back down because no forces are acting on it