gravity

gravity

Multiple Choice

What is gravity?

• A force

• Energy

• A push

• All of them

The force of gravity

There is a force between objects that have masses called the force of gravity

Poll

gravity is ................force

• pull

• push

Poll

gravity is ................. force

• contact

• non contact

This force is pulling you down towards the center of the Earth.

But forces come in pairs – you are also pulling the Earth with a force of gravity.

Multiple Choice

Any object with mass has gravity.

• True
• Sometimes
• False
• Never

Multiple Choice

Gravity attracts all objects towards one another.

• False
• True
• It depends

Multiple Choice

Why a ball falls to the ground?

• Earth's force of gravity is GREATER than the ball's, so the ball gets attracted to the ground. 
• Earth's force of gravity is LESS than the ball's, so the ball gets attracted to the ground. 

The size of the force of gravity between two objects depends on: ●

• the mass of the two objects ●the higher the mass the higher the gravity )

• how far apart they are. (the larger the distance the lower the gravity )

Multiple Choice

A force of attraction between 2 object that is directly related to mass and indirectly related to distance.

• mass
• weight
• gravity
• kilogram

Multiple Choice

As distance between two objects increase the pull of gravity 

• Increases
• Decreases
• Stays the same

Multiple Choice

When will the gravity between two objects be the LEAST?

• when the masses of both objects is small and the objects are close together

• when the masses of both objects is small and the objects are far apart

• when the masses of both objects is large and the objects are close together

• when the masses of both objects is large and the objects are far apart

Multiple Choice

When will the forces of gravity between two objects be the GREATEST?

• when the masses of both objects are small and the objects are far apart

• when the masses of both objects are large and the objects are close together

• when the masses of both objects are small and the objects are close together

• when the masses of both objects are large and the objects are far apart

Weight

The force of the Earth’s gravity on an object is called its weight. When you use scales or a forcemeter you are measuring the force of gravity. 

Weight

-is a force so it is measured in newtons (N).

-The force of gravity is different on every planet. The more massive the planet, the larger the force of gravity. I

f you could visit different planets your weight would change,

-Some people think this means there is no gravity there. This is not true. There is a force of gravity on the Moon, but it is about one-sixth as strong as on Earth

Multiple Choice

What is the SI unit used to measure force? 

• pounds 
• grams 
• newtons 
• friction

Multiple Choice

The force of gravity acting on an object is the object's ______.

• mass
• matter
• weight 
• friction 

Multiple Choice

A person would weigh less on on the Moon than on the Earth because . . .

• Moon has more mass, and therefore more gravity
• Moon has less mass, and therefore more gravity
• Moon has more mass, and therefore less gravity
• Moon has less mass and therefore less gravity

mass

-Mass is related to the amount of matter in an object and it is measured in kilograms (kg).

- --Another way of thinking about mass is to do with motion. Something with a small mass will accelerate faster when you apply a force to it than something with a big mass.

Multiple Choice

A measure of the amount of matter in an object

• mass
• weight
• gravity
• pounds

Your weight can change

but your mass would stay the same.

gravitational field

There is a gravitational field around all objects. A gravitational field is a region where a mass experiences a force.

On Earth, the gravitational field strength is 10 newtons per kilogram (N/kg).

To work out the weight of an object using this equation:

Weight = mass × gravitational field strength (N) (kg) (N/kg)