Recent content by Uk_Ghost

The speed of light is a constant. How could you possibly it to tell us the gravitational pull of a planet? The only time light is 'bent' is during gravitational lensing from something huge like a black hole or a galaxy cluster which creates warped space-time which would bend everything in it...

Thanks for the help everyone. That one has been bugging me for a while. Been over it with loads of friends but we could never come to a solid conclusion heh.

So this is just a problem of inertia?

Ah now that i can grasp. If its a question of friction then i can see why it would stop. Not because the tyres are moving any slower than they were but because they are unable to get the grip needed to be propelled so suddenly at that speed. So the amount of acceleration would rely purely on the...

That's what i want to know. Somehow when the car enters the ramp its tyres stop. I don't know why this is, surely the engine is still making them rotate at that speed.

So why wouldn't your speed be added to that of the walkway? if you're doing 75 mph and the walkway was moving at 70 mph then once you were on top of it your overall speed would be 145 mph surely. I can understand if you're assuming the vehicles are driving alongside each other because then they...

No worries :)

But i fail to see how that would work. This is the way i see it. If you were able to hold a car above the ground and then started its wheels spinning at 75mph, when you dropped it the car would shoot forward once in contact with the ground. Same as if you were standing on a platform which is...

Yes, all objects with mass have gravitational pull. The amount depends on the mass of the object. Like how the Earth has enough mass to be able to keep the Moon in orbit around it but the Moon's mass is also big enough to affect the Earth's tides. If an object was able to have no mass it would...

It would have to have some form of mass to be affected by gravity. Therefore it would have no way of measuring the gravitational pull if it is unaffected by it. Unless of course it was measuring another object which did have mass being pulled towards the planet.

The situation is this: A truck is moving at 70mph with a ramp leading into it at the back. A car with front-wheel drive is behind it doing 75mph. The car goes up the ramp and into the truck. Here is where the dispute starts. My theory: Once the front wheels of the car are on the ramp the...