Why is it on the bus you jump
-
Why is it on the bus you jump, u will still land on the exact same spot?
Hint: think of projectile motion
-
You are moving in the same velocity as the bus .
But if the bus brakes suddenly while you are still in the air , good luck . The bus' velocity decreases , but however , your velocity stays almost the same . Hence you will fly towards the front of the bus and smash into the windscreen.
To know more , use this equation :
Acceleration = Final velocity - Initial Velocity / Total time -
Coz you're moving with the fcuking bus.
-
all the answers above + due to inertia
-
why inertia?Originally posted by lost.soul:all the answers above + due to inertia -
Wrong ! Inertia has nothing to do here.Originally posted by lost.soul:all the answers above + due to inertia Only when starting off and slowing down then inertia comes into effect .
Inertia is termed as "The unwillingness of an object to start moving from rest and the unwillingness of an object to stop while moving." -
when u jump u have initial horizontal velocity = that of bus e.g. 60m/s
when u land, lets say after 2 seconds, u would have travelled 120 m, but the bus oso travell same distance so it feels like u land on the same spot
maybe i wrong i dunno my projectile motion very noob -
cannot find answer leh ? so the fly will move back or not? all the replies no one give proper answer...Originally posted by FireIce:
this one i want to ask very long ago.
if a helicopter hovers at the same spot for a long time, will it move along with the earth and stay at the position on earth or will the ground move away ? -
Originally posted by FireIce:
lolOriginally posted by John Wong:GEE....
if it was a vacumn inside the train, the fly would hit the back. (but then if it were a vacumn the fly would explode, and the fly wouldnt be able to fly anyway)
since it isnt a vacumn, a whole lot of factors come into play (how airtight the mrt is, how the air currents inside the mrt move, WHERE the fly is inside the MRT as this results in how the air currents affect the fly, the SHAPE of the mrt interior... aerodynamics and #*!^ like that... just to name a few)
so the movement of the fly will become unpredictable.
its a stupid question.... but....
if the fly just stays still (actually it cant since it needs to HOVER) but assuming all it does is hover...
i guess it would hit the back eventually cos air would be moving through the train pushing it back....
argh, stupid question. -
as the helicopter hovers, it constantly apply a force to the earth, but the earth's mass is too large compared to the heli, so it doesnt move, however, the earth exerts a normal reaction force that may push the heli away, hence the heli need to apply more force to hover at a constant heightOriginally posted by smartboy4:cannot find answer leh ? so the fly will move back or not? all the replies no one give proper answer...
this one i want to ask very long ago.
if a helicopter hovers at the same spot for a long time, will it move along with the earth and stay at the position on earth or will the ground move away ?
again i need someone to clarify my answer -
oh fifi's last time siggy is
~~EviL AngeL~~
[/i:vel eindzel/]
ignore me...
I aM jUsT aN eXtrA-oRdiNaRy PaRanOid ^*&$%
(that happens to love prata) -
this is evolving frm a normal thread to a chim thread
-
you mean in terms of height ?Originally posted by lost.soul:as the helicopter hovers, it constantly apply a force to the earth, but the earth's mass is too large compared to the heli, so it doesnt move, however, the earth exerts a normal reaction force that may push the heli away, hence the heli need to apply more force to hover at a constant height
again i need someone to clarify my answer
i'm talking about the earth rotation will it affect the helicopter's position ? , to make it simple.
like the helicopter hovers for 1 whole day without any moving, will it still be at the same exact spot as the ground or will it be at another location already (since the earth/ground moves along with rotation) -
Newton's Third law of motion . The force needed to move the object must be greating than the force acting against it .Originally posted by lost.soul:as the helicopter hovers, it constantly apply a force to the earth, but the earth's mass is too large compared to the heli, so it doesnt move, however, the earth exerts a normal reaction force that may push the heli away, hence the heli need to apply more force to hover at a constant height
again i need someone to clarify my answer -
fifi last time so frenwee oneOriginally posted by FireIce: -
agree.Originally posted by MyPillowTalks:fifi last time so frenwee one
so young and friendly
-
People do mature a lot after 7 years.
-
hanor... so lively, last time she not so firece oneOriginally posted by vIn.Warrior:agree.
so young and friendly -
maybe during that time, she not mod yet?Originally posted by MyPillowTalks:fifi last time so frenwee one -
One word to sum it up: Velocity
-
~~EviL AngeL~~
[/i:vel eindzel/]
ignore me...
I aM jUsT aN eXtrA-oRdiNaRy PaRanOid &$!@%
(that happens to love prata)
lol!
last time her typing more like xmm style...
now become more cheng shu and mature le.... -
36 years old liaoOriginally posted by hiphop2009:~~EviL AngeL~~
[/i:vel eindzel/]
ignore me...
I aM jUsT aN eXtrA-oRdiNaRy PaRanOid &$!@%
(that happens to love prata)
lol!
last time her typing more like xmm style...
now become more cheng shu and mature le.... -
dunno my first time see this forum was when my bro used itOriginally posted by mrcoconut:maybe during that time, she not mod yet? -
Is she really that old ?