Escuela Mundo Maya Science Test 9th I Term 21

Is the quantity of energy being transferred over a period of time

• Watt

• Work

• Power

• Energy

How machines do work?

• Change the distance to move something

• Change the direction of the force

• Change the distance of work done.

• Change the quantity of work done.

What is the difference between work in and work out in the real life?

___________________ is the unit of power.

When you see on the microwave 150 Watts, 15 Hz, and 120v, which represent the power?

• 15 Hz

• 150 Watts

• 120v

• none of all

In real world will be possible toa a machine has a 120% efficiency?

• True

• false.

• maybe

• I don't know.

Which is not a simple machine?

• wedge

• inclined plane

• lever

• wheel and axel

Is it an example of a wedge?

• bicycle

• broom

• butter knife

• stair

Find the input work when a machine has a percent of 65.5% and has an output work of 85 J

• 130 J

• 129.77 J

• 103 J

• 128 J

How much power will Donovan (75 kg) generates when he was running 9 m up ramp for 15 seconds?

• 3.3 J

• 33.11 J

• 33100.8 J

• 331.08 J