Recent content by druuuuuuuunnk

Ok thanks, I look those things up. I appreciate the help.

Its the gradient? Its the solution of to find x that I'm confused about. Do I differentiate it to simply it? Is that the answer the questions for or what else should I be looking at to solve it.

Hi! Find the x co-ordinates of the turning points of a function Y=2x^3+36x-1 Determine the nature of the turning points. I've been reading up on differentiation, I understand but I'm unsure what to do here. If someone could give me some helpful steps so I could learn to do this for...

Ok, cheers mate!

Actually for the second part, I'm meant to use power = current squared * resistance. So I'd get 720,000

Ok so, to find the charge in 200 seconds. I multiply 3mA by 200 because charge = current*time Giving me 600A ?? And for the second part I use Power = voltage * current So the power dissipated in the resistor = 600 (current) * 2 (resistance) is this wrong ?

"Electrical current is a measure of the amount of electrical charge transferred per unit time. It represents the flow of electrons through a conductive material. Current is a scalar quantity (though in circuit analysis, the direction of current is relevant). The SI unit of electrical current...

Amount of charge flowing through a resistor? the current through a resistor is 3 mA. What charge will flow through it in 200 seconds? if the resistor has a resistance of 2.0 kΩ what will be the power dissipated in it? for the first one, i have no idea. i can't seem to find any formula...

so am i right to say i need to use the formula F=M*(V/T)? it has given me (i)30,000 and (ii)6,000. are the units joules for these? I'm trying to find the work done to stop the ball.

i think I've worked it out on my 1's, for anyone else who might need this information you use the formula F=M*(V/T)

im looking at the kinematic equations but i don't know what one i should be using. i've rearranged Velocity=initial velocity + accelleration * time i got (velocity/time)-initial velocity = accelleration is this correct. ALSO how can i use this i only have velocity, not initial...

wait never mind, sorry that was kinda stuuupid, i havnt used the time at all.

am i allowed to use the understanding that impulse equals the change in momentum. so F*T=M*V im thinking this becuase i have been given mass and velocity? so i would get 3000 jolues

A ball of mass 0.25kg is whilred around in a horizontal circle on the end of a string of the length 0.03m, and completes 5 revolutions per second what is the angular velocity of the ball? is it right to use angular velocity = 2 pi F giving me a answer of 31.4 ms

A boy catches a ball of mass 150g, which is moving at 20ms^-1 A) calculate the force which he must exert to stop it in (i) 0.10s (ii)0.50s Im resonably sure i use the formula W=F.D what confuses me is that to find the force i have to use F=M.A but 20ms^-1 is not accelleration. if not...