Lindsey P asked: If one vehicle driving 30 meters/second collides with another travelling in the opposite directing at 20 meters/second in a front end collision, assuming they both have a mass of 1000 Kg, what is the resulting velocity?Tour...

Soda Tears asked: Say 95% the speed of light. Neptune is a minimum of 4.3 billion km away from Earth. So if I was travelling at 285 000 000 m/s, I would only need 13 seconds to reach Neptune, am I right? oops I got the units mixed up so its 4 hours 11 minutes 27 seconds ?Tour...

MajorSparky asked: Einstein says that a clock travelling at high speed (near the speed of light) will go slower than a `stationary’ clock. It has been demonstrated that a clock returning to earth from an orbiting satellite shows less time than a stationary, earth bound, clock. How come? Velocity is relative. I.e. the earth bound clock is moving at high speed...

mike asked: You are travelling downward in an elevator and are slowing to a stop. How does the normal force on your feet compare to your weight at this time? How do you know?Tour...

Peter D asked: If you are travelling just below the speed of light and you shine a torch in front of you what happens? Does it travel at your speed plus the speed of light or does the light appear to move very slowly away from you? Also if you turn around and shine it backwards would the light appear to be travelling as almost twice the speed of light away from...

18MarkAttack asked: Also, if the universe is expanding, then the speed of light must be different relative to different parts of the Universe, does this make sense? (Because if we’re already travelling at a a high velocity, then light must appear to travel at a lower speed here than it does at the centre of the Universe. Or is this something to do with...