how ca rockets move in outerspace when ther is nothing but vacuum ,what will the thrust push?

Answer 1

This is the classic question.

Rockets don't move because anything pushes against anything.

I believe it's Newton's Second Law of Motion which says that for every action there is an equal and opposite reaction. The rocket works because when the exhaust gases leave at high speed from the rear, there is a reaction which moves the rocket in the opposite direction.

Answer 2

"For every action there is an opposite and equal reaction." The gases exploding from the rocket push the rocket. There is little or no gravity or friction in space to hold the more massive object in place, so the thrust needed to move the rocket in space can be less than what is needed to get it up off of the Earth.
Easy way to check it out. Get on something with wheels but no motor, like a wagon or skate board while carrying something in both hands (rocks or bricks). You'll have to do this some place where you have enough room. The skate board or wagon will also have to be on a flat even surface to make the friction less. Now, while the thing your on is setting still, throw the bricks or rocks as hard as you can to the back or the front of the wagon or skate board. You will move away from the direction you threw the rocks or bricks (unless you throw them to the side and that's not fair as the wheels aren't pointing that way and what little force you can muster for your 'thrust' can't overcome the sideways friction of the wheels on the ground!).
Just be careful and use common sence to keep from hurting yourself or others if you try this.

Answer 3

Thrust does not push on anything. It is Newton's third law, for every action there is an equal and opposite reaction. As the thrust exits the back of the rocket, the rocket itself moves forward, the opposite direction,with the same amount of force. Really, the thrust is pushing against the back of the rocket itself. This is all demonstrated when you hold a garden hose that is turned on high pressure. You must work to keep the garden hose from moving. The exiting thrust, in this case, the water, is pushing the hose back with the same amount of force.

Answer 4

Rocket propulsion does no longer require a medium to push adversarial to. for each action there is an equivalent and opposite reaction. The action, in ths case, is the forcing of rocket exhaust out of the engine by technique of the explosion of combustion, and the reaction is the stream of the rocket in the different course. The pushing is carried out by technique of the rocket exhaust on the decrease back of the engine, and the rigidity is geared up by technique of the enlargement of combustion products in the continuous explosion. the actual incontrovertible truth that area is a vacuum yet rockets paintings ok up there might want to signify to you that your statement about wanting something to push adversarial to is fallacious.

Answer 5

The rocket pushes against the gas it's kicking out the back.
Picture yourself on roller skates and throwing a bowling ball. Wouldn't you expect to move backwards when you threw it? Air didn't have anything to do with you moving. Same thing on a rocket, but you're throwing exaust gas instead. It doesn't weigh much, but when you push the gas out at 5,000 mph, you get a lot of push.

Answer 6

Hi. The thrust pushes against the front of the engine while the gases escape from the rear.

Answer 7

the violent reaction at the back of the rocket expells with some force. since everything must have an equal reaction, the rocket moves forward.

Answer 8

An analogy to let you understand...

Consider a train car sitting on a track. Fixed to the car is a large cannon. What happens when the cannon fires?

Answer 9

the rocket moves from the initial start it got when it broke the atmosphere. look up the law of inertia and you will understand