Is the rate of doing work or the rate of doing energy.

Power = = The unit for Power is (Joule per second) , watt

1 watt = The unit watt is named after James Watt who was a Scottish inventor and mechanical engineer known for his improvements on steam engine.

POWER

HOW POWER-FUL AM I?

Objective:After performing the activity, you should

be able to compute for your power output in walking or running up a flight of stairs.

Materials Needed: meterstick timer

Procedure:1.Write the group members’ names in the first column of the Table 1.

NameWeig

ht(N)

Height of

Stairs (m)

Time taken

to climb(s)

Energy expend

ed(J)

Power

(J/s)

Leo Mahilum

Jason Acabal

James Cleffer Balbon

John Paul Paculanang

Procedure:2. Enter Each members’ weight in column 2. To

solve for the weight, multiply the mass (in kg) by acceleration due to gravity (g=9.8m/)

NameWeig

ht(N)

Height of

Stairs (m)

Time taken

to climb(s)

Energy expend

ed(J)

Power

(J/s)

Leo Mahilum 392

Jason Acabal 382.2

James Cleffer Balbon 372.4

John Paul Paculanang 362.6

Procedure:3. Measure the height of the flight of stairs that

you climb. Record it on the table.

NameWeig

ht(N)

Height of

Stairs (m)

Time taken

to climb(s)

Energy expend

ed(J)

Power

(J/s)

Leo Mahilum 392 4

Jason Acabal 382.2 4

James Cleffer Balbon 372.4 4

John Paul Paculanang 362.6 4

Procedure:4. Each member will walk or run up the flight of

stairs. Use a stopwatch or any watch to get the time it takes for each member to climb the stairs. Record in 4th column.

NameWeig

ht(N)

Height of

Stairs (m)

Time taken

to climb(s)

Energy expend

ed(J)

Power

(J/s)

Leo Mahilum 392 4 3.28

Jason Acabal 382.2 4 3

James Cleffer Balbon 372.4 4 2.05

John Paul Paculanang 362.6 4 3.45

Procedure:5. Solve for the energy expended by each

member. Record them in the 5th column of the table.

NameWeig

ht(N)

Height of

Stairs (m)

Time taken

to climb(s)

Energy expend

ed(J)

Power

(J/s)

Leo Mahilum 392 4 3.28 1,568

Jason Acabal 382.2 4 3 1,528.8

James Cleffer Balbon 372.4 4 2.05 1,489.6

John Paul Paculanang 362.6 4 3.45 1,450.4

Procedure:6. Compute for the power output of each

member.

NameWeigh

t(N)

Height of

Stairs (m)

Time taken

to climb(

s)

Energy expend

ed(J)

Power(J/s)

Leo Mahilum 392 N 4 m 3.28 s 1,568 J 478 w

Jason Acabal 382.2

N4 m 3 s 1,528.8

J509.6

wJames Cleffer

Balbon 372.4 N

4 m 2.05 s 1,489.6 J

726.6 w

John Paul Paculanang 362.6

N4 m 3.45 s 1,450.4

J420.4

w