Tag Archives: ball

How do you fix a distorted suction cup?

I bought this “Desktop Punching Ball” and it was awesome for about 3 days when the suction cup becomes somewhat distorted and doesn’t hold on to the floor as well. On the box it says to put it in hot water for a few minutes.

Guess what after I did that it didn’t hold to the floor at all. Now it’s just messed up – with no suction power.

How exactly do I fix it?? How come leaving it in hot water messed it up even more (it still looks fine but it doesn’t suck anymore)

A 2180 kg cannon fires a 17.3 kg ball horizontally?

The cannonball has a speed of 133 m/s after it left the barrel. The cannon carriage is on a flat platform and is free to roll horizontally.
What is the speed of the cannon just after it was fired in units of m/s?

Assume the same explosive charge is used and the total energy of the cannon plus the cannonball system remains the same. Disregard friction. How much FASTER would the ball travel if the cannon was mounted rigidly but all other parameters were the same (in units of m/s)?

what inspires you to write?

i cant seem to write anything these days and it’s like soemthing in me needs to be freed, you know when you have a ball of energy and dont know what to do with it?…….so what inspires you?