Stonebridge said:If you think of the jet of water as a cylinder of water, what volume of water passes in one second? You have the radius/diameter of the end and you know how long the cylinder is from the speed of the jet.
ar202 said:Yeah i thought of it that way but then hit a wall...
so the volume is pi*0.015^2*40 = 0.0283m^3 * 1000 = 28.3kg
then is it 28.3 * 40 to get 1132kgms-1 ? is there another step I'm missing?
Stonebridge said:That's it. That is the "mv" in one second.
Well done.
Momentum is a property of a moving object that describes how much force it has. It is calculated by multiplying the mass of the object by its velocity.
A jet of water also has momentum, which is determined by the mass of the water being expelled and its velocity. The faster and heavier the water is, the greater its momentum will be.
The momentum of a jet of water can be affected by the mass and velocity of the water, as well as external factors such as air resistance and gravity.
Momentum is a vector quantity, meaning it has both magnitude and direction. In the case of a jet of water, the direction of the momentum will determine the direction in which the water will flow.
Yes, according to the law of conservation of momentum, the total momentum of a system will remain constant unless acted upon by an external force. This means that in a closed system, the momentum of a jet of water will remain constant.