Study guide work and energy quiz

Question 1

Mechanical

Answer 1

• The energy of an object due to its motion and position.
• Usually used to describe large objects.
• It is the sum of kinetic and potential energy.

Question 2

Non-mechanical

the energy of an object that is NOT __ / include examples

Answer 2

• The energy of an object that is not due to its motion or position.
• Usually describes an object at its atomic level.
• Examples: electrical energy, chemical energy, thermal energy, sound energy.

Question 3

Work

moving __ in a certain way– has to do with energy

Answer 3

• applying force in order to move an object in a given direction
• when work is done on an object by another object, there is a transfer of energy between objects

Question 4

Energy

Answer 4

is a measurement of an object’s ability to do work

Question 5

Positive work

Answer 5

• if an object moves in the same direction as the direction of the force applied to it, the energy of the system is increased.
• work is greater than the object
• w > 0
• ex: people pushing a truck forward

Question 6

Negative work

Answer 6

• If an object moves in the direction opposite to the direction of the force applied to it, then the work is negative. The energy of the system is reduced.
• w < 0
• ex: air resistance against a parachute

Question 7

Zero work

Answer 7

• if an object does not move, even when there is force applied to it, then no work is done being on the object.
• w = 0 j

Question 8

Formula for work (include unit)

Answer 8

• w = e ⁱⁿⁱᵗⁱᵃˡ - e ᶠⁱⁿᵃˡ
• 1 joule = 1 newton-meter