Recent content by Daft

A magnetic field is any region where a magnetic force is obtained Magnetic flux is a measure of how much magnetic force is obtained in a particular area Does that help?

Ahh yes, I was wrong with respect to that, my apologies I was focusing too much on maximum height, and missed that error

Think about what the "nCx" part of the formula does. Let's say we're rolling a regular dice 4 times, and we want the probability of a 6 only once. We know this would consist of 1 success and 3 failures ( \frac{1}{6}\frac{}{} )( \frac{5}{6} )3, however it does not account for which roll we get...

Correct

Whether you choose to combine them into 1 fraction, and compare numerators, or multiply both sides by x(x-1)(x+1), it would be easier on you if you do not expand the brackets eg. instead of writing "Ax2 + Ax", leave it as "A(x+1)(x)" Since the values of A, B and C are the same for all...

That's only half correct, its not every time the function crosses zero

You're correct in that the ball is falling when the function is below the x axis Think about what the gradient of a line at any point on the graph represents, and how this is affecting the velocity. When the ball is at maximum height, what would the velocity at that point be?

Well, your method of working is correct, but in the very beginning you used the wrong value of d "A ball rolls off a table which is 2.8m high" not 9.8 like you used

You're theory is right, but your answer confuses me, what is that? How are you finding the time the ball takes to hit the ground?

You didn't really only need half, but since Vo = 0, then volt = 0 so volt+1/2at2 = 0 + 1/2at2

The vertical distance is the height of the shelf

Recheck your working, you made a mistake Your equation there is: at+1/2at2 instead of volt+1/2at2 its just 1/2(9.8)(.222)

Okay, look at this this way (I really don't mean to sound condescending, so sorry if it does): 2/4 = 1/2 right? That's easy to understand We have to add: 1/9 + 1/4 + 1/12 What we have to do is write these fractions in a way that they all have the same denominator (which is the lcm...

The LCM is 36, but its not 1/36+1/36+1/36 is 1/9 = 1/36? is 1/4 = 1/36? is 1/12 = 1/36?

Where n is the reaction, f is the frictional force (μn), F is the force pulling the block, m is the mass of the block and g = 10 as stated You can see that mgcosθ = n and mgsinθ + f = F The answer is