Physics warm up - Gravity!

Define the term gravity.

• A force that keeps things on the Earth's surface

• The feeling you get when you fall

• A force of attraction between objects.

• A force experienced on the Moon.

Identify the term that best describes "a region of space in which an object will experience a force due to gravity".

• Gravitational Field

• Planet

• Earth

• Atmosphere

Which is needed to determine the amount of gravitational force between two objects?

• distance and mass

• weight and time

• area and weight

Tags

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What is mass?

• How much MATTER makes up an object.
• How much GRAVITY is pulling an object.

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A brick and a pencil are dropped at the same time from the same height.

If air resistance is ignored, which one would hit the ground first?

• brick

• pencil

• both would hit at the same time

The amount of matter in an object is 

• pressure
• weight
• mass
• force

Tags

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According to Galileo's observations gravity pulls on all objects equally regardless of _____________

• size

• shape

• mass

• time of day

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NGSS.HS-PS2-4

When an object is falling, and it reaches it's maximum speed because air resistance is equal to the force of gravity, the object has reached __________________________.

• Free Fall
• Terminal Velocity
• Projectile Motion
• Orbit

Tags

NGSS.HS-PS2-1

What is the centre of mass ?

• it is a single point at which the object can balance.
• The mass is distributed equally around it.
• the centre of gravity of the object
• All of the above

What is one way you might increase the stability of an object?

• Lower the centre of gravity

• Raise the centre of gravity

• Increase the height of the object

• Shorten the base of the object