Recent content by Griff38

What I asked was so fundamental there must be an answer I've just not managed to find one yet.

Thanks but that doesn't help me.

Mirrors show lateral inversion because of the fact that the distance the image is behind the mirror is the same as the object is infront so think of a letter F infront of a mirror, pick some points on the letter F to the left of the mirror and think where their image would appear to be in the...

If the two arrows with the same momentum but different kinetic energies hit the target then since the average decelerating force acting on the arrow is equal to the rate of change of its momentum then if the heavier arrow penetrates further and takes longer to stop the force exerted on the...

Thanks for the help but I still don't get it. I have seen the plots of potential energy against distance and that the gradient of this generates a force extension plot. Now say you've got a 2m long metal wire and you add a weight at the end that causes it to stretch by 0.5mm, there is tension...

Thank you so much, that's made it very clear.

If work done is defined as F X distance moved in the direction of this force, is friction doing work on a moving car since if the car is moving to the right friction is actually acting to the left? or should the definition of work done be F x distance moved parallel to the line of action of this...

I don't get why the tension force should increase up to a point in a stretched metal wire as the wire is extended surely whatever attractive force exist within the wire (I am familiar with metallic bonding) should get less as you increase the average distance between the particles. I am very...