Suppose car 1 collides with car 2; car 2 was not moving. in an ideal situation with no friction, according to the law of conservation of momentum, what happens to the momentum after the collision? it is slightly reduced it stays the same it is slightly larger it is greatly reduced

it will stay the same then.

it stays the same

because. . .

The law of conservation of momentum states that, if left alone, the total momentum of two interacting objects that make up a system Remains the same.

not sure if this is what you'r looking for nnew= nold

it provides an alternative energy pathway for the reaction to proceed.

a catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the course of the reaction.

catalysts increase the rate of reaction without being used up. they do this by lowering the activation energy needed. with a catalyst, more collisions result in a reaction, so the rate of reaction increases. different reactions need different catalysts.

a catalyst works by providing an alternative reaction pathway to the reaction product. the rate of the reaction is increased as this alternative route has a lower activation energy than the reaction route not mediated by the catalyst.