10_Power

POWER

Ms Wida N Agustina

The rate of this

energy transfer, or

the rate of work
done, is called power

The more work you do, and the shorter

time in which you do it, the greater

your power.

P = Power (Watt)
W = Work (J)
t = time (s)
E = energy changing (J)

Power
Ratings

Table

EXAMPLE

A person with a mass of 60 kg

climbs a coconut tree to a height of 5 meters for

10 seconds.

The power that the person needs to climb the

coconut tree is... g = 10 m/s2

Multiple Choice

What is meant by power?

• The rate of work done

• The rate of gravity done

• The rate of acceleration done

Multiple Choice

What is unit of power?

• Joule

• Watt

• Newton

Multiple Choice

If the work done that Alex did 50J and the time he took was 5 s. What is power happen?

• 10 Watt

• 20 Watt

• 30 Watt

• 40 Watt