We investigated who packs the most powerful punch. Our research showed that the man with the most mass (sorry to put it that way, Mr Ashish Dean, but i can't explain your victory in any other way!) is able to deliver the maxmum impulse to the sand plastic bottle because he can throw the maximum body weight into his punch (fist). No wonder sports like boxing and wrestling involving the use of poweer have very strict weight divisions!

Sufficient Centripetal Force required to prevent the toy car from falling off at the top of the vertical loop (even though it is upside down) is provided by the high enough speed of the toy car. What is the minimum speed at the top of the loop required by the toy car to prevent it from falling down due to gravity?

How does the balloon-powered toy-car work? It is a perfect demonstration of Newton's which Law?

Why does the plastic cylinder accelerate from rest when the jaw of the clip closes? In such cases, what is the maximum speed that can be achieved by the plastic cylinder?