Did a Rock Hit Your Windshield, or Did Your Windshield Hit a Rock?

Now the ball behaves as you expect. Its horizontal velocity decreases so that it falls behind the main vehicle. However it will not hit your windshield yet. Each bounce is somewhat lower than before, including air drawn on the effects with the soil and reduce energy. You should be better.

Rock out

Now tell me that the baby drops a rock outside the window. Children! Or there is probably a truck carrying pebbles, and some of it falls through a crack. When the rock hit the street, its speed may vary in several ways. First, there is a frictional force between rock and street, which will reduce the horizontal velocity of the rock. As we saw the above, slowly bad.

Second – and it may seem strange – because a rock is irregularly shaped, it is possible that it spreads the pavement and hits that it avoids higher than starting.

Hold! Is it not a violation of the law? Do you know, the law of conservation of energy? Nah, it’s a power TransferThe Both a rotating and moving rock have rotation and translation (linar) motion power. Some collisions can convert the rotation energy into translatory energy, which makes the rock bounce even higher. Bad to the higher.

Here is what it looks like:

So you are cruise on the side of the highway, say, one hour 70 miles – and the top of its path has a rock in the air. It’s at the moment, but you are not. Let the court note: Rock didn’t hurt you. You hit the rockThe However the effect is the same. By the way, you need a new windshield.

Rock and roll

This is a commendable scene, but what if you don’t have a truck in front of you? In fact, the more common cause of the windshield damage is a rock lying on the street that is kicked by another vehicle. You may think it was shot in the car behind, but it is not quite correct. The rock still doesn’t move back.

This is the image: a wheel rolling up the road and stuck in a rock tire trades. When the rock comes in contact with the ground, it is resting. What would look like here: