Recent content by Pheo1986

im assuming when you say distance that's the range the projectile has gone? if so and you also have the angle then you can use the basic range equation to find the intial velocity. range = ((v^2)(sin (2*angle)))/gravity so v=sqrt((range*gravity)/(sin(2*angle))) sorry if i read your question...

wow cheers for the indepth explanation Bob. I am not to sure what my neutron flux will be yet but my experiment will no way last as long as 4 years so I am sure i won't be having any problems with deuterium. Thanks

as this is a projectile you also know the accelration in the vertical direction to be gravity. 9.81 m/s^2. what you want to do is separate this question into vertical and horizontal. so if you konw the inital velocity, u, at an angle of 50 then you can work out the vertical intial velocity...

Hi all. I am going to be doing an experiment involving neutron scatter. I am going to be firing fast neutrons into water and then detecting the thermal neutrons scattered. I am also going to look into thermal neutron capture where the hydrogen atom captures the thermal neutron and gives off a...

moments about a point. with your legs straight the force of your legs are acting at a further point away from ur body than they do when they are bent. moments = force * distance

i think (not 100% sure) for part 2 and 3 you can use the same method as part 1 except the velocity will be the sum of the 2. so for part 2 the total velocity will be 60 + 60 = 120 km/h

that seems gd to me. it has fallen 12.2m so it will be 7.8m above the sidewalk

this question involves moments about a point. so firsty you want to draw a diagram of where all the forces are. so you have two supports (call them A and B) and the mass of beam will be halfway between them (0.5L) and the mass of the piano will be a quater the distance from support A( 0.25L)...

i know water isn't great at being compressed but surely the impact time of the water bottle will be longer as the bottle will deform and have a longer time in contact with your head (and so less pain), where as the ice bottle is solid and so the impact time will be shorter and therefore a...

tbh i think you've done the hard part. so now you know how high P is above the floor when the string breaks. now P is in freefall. so its acceleration is 9.8 m/s^2, you've already calculated the height above the floor it is at and you only need one more thing to be able to find the time and...

to get you started... b) you know that the acceleration is - 9.8m/s^2 ( as its going against gravity), the initial velocity is 9.8 m/s and the time is 3s and you want out find its height. so use an equation that has all 4 of these into calculate the height and then add the initial 39.2m height...

ok. so you have the initial velocity, final velocity and hieght. from this you can find the acceleration. you then know that f=ma and also that f=coefficient of kinetic friction * the reaction force. so now you have acceleration, mass and you can work out the reaction force useing the 45...

you can also find out the range using the equation range = v^2*sin(2*theta)/gravity

me too. there's seems to be nothing wrong with your method. i can't think of another way of doing it

im not 100% sure about this but you don't need to find t, you just need to rearange your 1st equatoin so you have t=... and then substitute that into your 2nd equation and then you can find theta. maybe