The forward momentum forces you back.
When a bus accelerates, the force of the bus moving forward through the inertia pushes passengers backward. Additionally, passengers may lean backwards instinctively to counterbalance the force and maintain their equilibrium.
It's all about momentum. When the bus is standing still, your body is standing still and has no momentum. When the bus begins to move, you body wants to stay stationary. Because it's resisting the acceleration of the bus, you don't accelerate with the bus and therefore get pushed backwards.
When a bus starts moving forward, the inertia of the body tends to resist this change in motion. As a result, the body leans backward in reaction to the bus acceleration before adjusting to the new motion.
No long hair need not fall , just because it is long.
The Russians tend to be unwilling to give out figures like that.
No, ladybugs can't fly backwards. Ladybugs are often hard pressed to even fly straight. If you watch them, they tend to land without much reason, as they hit things hard, and unbalanced.
Birth rates rise as death rates fall?
No, a donkey's tail does not fall off. This is in reference to the animal. However, donkey tail plants do tend to fall off.
When a bus accelerates, the force of the acceleration pushes you in the opposite direction (Newton's third law). Your body, still at rest, doesn't immediately move with the bus, causing you to fall backwards until your body catches up with the moving bus. This is similar to how you lean back when a car accelerates.
They have leaves that tend to lie in a plane at right angles to the strongest light, hence usually north and south.
The stress is in the second syllable ... in-TEND
I believe rose hips are very rich in ascorbic acid. If you don't tend your roses and just let them fall off by themselves, they will develope hips. It takes awhile, but they are extremely tart and good for you.