₦airaland Forum

DrAuthentic:
a load of mass120kg is raised vertically through a height of 2m in 30s by a machine whose efficiency is 100%. Calculate the power generated by the machine. [g = 10ms -2]
anybody.

We know power is work done (or energy) divided by time

We have time but we need to calculate work done

Work done= force * distance

Force in this context is the object's weight and is equal to the it's mass multiplied by the acceleration due to gravity (F= ma)

Force/ weight = 120 * 10 = 1200N

Following the first equation, work done = force * distance
W = 1200 * 2
W= 2400J

And since power = work done / time
P = 2400/ 30
P= 80W

victoroscar:
guys these are d real hot pies

10.into the badlands
9.teen wolf
8.the flash
7.Merlin
6.legend of the seeker
5.power
4.the walking dead
3.prison break
2.game of thrones
1.24

I don't get the hype on teen wolf. I've tried but i can't watch past the first season.
My best is still GOT
Followed by suits, how to get away with murder, the haves and have nots, supernatural,big bang theory and designated survivor.

fashmann:
keep whining me..issorite


eyah...you have a new number now right?

Nope, I'm going to retrieve the sim. It's a standard sim so I can't just abandon it

chinedubrazil:
another riddle for genius
=
in a room, there are two doors, a table and a chair and there is also 6inches round hole at the ceiling.
ade want to escape from that dungeon(room), one door leads to a hungry lion and the other door leads to a glass tunnel with high radiation from sun which would even kill ade if he mistakenly open that door.
so how can he escape from that room?
=
Daqueen7, vivie01, chuksDavinci oya take it

I'm not sure cause I have a feeling the two doors has something to do with it but I think he'll just put the chair on the table and get out through the hole in the ceiling.

fashmann:
I thank God ...The result was good

You have not been active on WhatsApp,hope nothing went wrong?

That's nice.
I trust you, the oga for biology

I lost my phone jae, on the day of the third mock.

ChuksDaVinci:
@Adaomalight & @vivie01

U gals were late to the party.
still u could exercise ur mind before taking a peep at the answers.

Do another one na

fashmann:
DaQueen

how was the exam?

Oga Fashman
It was alright,yours?

samuelizz:

Sir oga Weedite

Mobuoy19:
Please I need help with this question.
An object weighs 10N in air and 7N in water. What Is its weight when immersed in a liquid o relative density 1.5?

Thanks

R.d = upthrust in water/upthrust in water

Upthrust in water= 10-7 =3N

1.5 = Upthrust in liquid/3

4.5 = upthrust in liquid

The weight in the liquid equals the original weigjt minus the upthrust
W =10N -4.5N
W= 5.5N