Physics 3.3 Flashcards

1
Q

What is the equation for work done and its standard unit?

A

Work done=force parallel to motion * distance parallel to the motion
-The standard unit is a joule which is equal to one Nm so one joule is transferred when a 1N force causes an object to be moved 1m

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Difference between work and work done?

A

-Work is scalar whereas work done is a vector quantity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is the conservation of energy principle?

A

-The total energy of a closed system is constant and energy cannot be created nor destroyed only transferred.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Define Power?

A

-Power is the rate of doing work and is measured in Watts or Joules per second

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What are two equations for Power?

A

-Power=work done/time taken
-Energy=Power* time

How well did you know this?
1
Not at all
2
3
4
5
Perfectly