Semester 1 Review

What is mass?

• The amount of matter in a body

• The amount of water in a body

• The amount of fat in a body

• The amount of jellybeans in a body

What is weight?

• The magnetic force acting on the body

• The electric force acting on the body

• The gravity acting on the body

• The gravitational force acting on the body

If an object has a force due to gravity of 20N, what is the mass of that object?

• 3

• 2

• 4

• 196

If an object has a mass of 26, what is the objects force due to gravity?

• 2.6 N

• 254.8 N

• 300 N

• 4 N

What are the units for energy?

• Watts

• Joules

• Newtons

• meters

What has to be true about an object for it to have kinetic energy?

• it must be moving

• it must be elevated

• it must be experiencing a net force

• it must be accelerating

Tags

NGSS.MS-PS3-1

Does your desk have kinetic energy right now? Explain and justify your answer.

• yes because it is sliding across the room right now

• no because it is not moving

• yes because it has someone sitting in it

• no because it is here on earth

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

All of the following are examples demonstrating mechanical energy EXCEPT –

• an oven cooking food.
• a fan blowing out air. 
• a boy riding a bicycle.
• a girl writing with a pen.

What is potential energy?

• the energy an object has due to its position or condition
• the energy an object has due to its motions
• the energy an object has due to its chemical composition
• theh energy an object has due to its atomic structure

Tags

NGSS.MS-PS3-2

When does an object have no kinetic energy?

• when it is at rest
• when it is moving very slowly
• when the only force that is acting on it is gravity
• when it has no electrical charge