Recent content by nasadall

Homework Statement Peter is pulling Paul who is on a toboggan, along a rough horizontal snow surface using a rope which makes an angle of 30ᵒ with the horizontal. Paul and the toboggan have a total mass of 40kg and the toboggan is moving with a constant speed in a straight line. Given the...

i think the answer is Ns

you are right, say Q in possitive and P negative!

Homework Statement Two particles P and Q of mass 2kg and 5kg respectively are moving towards each other along a straight line on a smooth horizontal surface. The particles collide. Before the collision the speeds of P and Q are 6m/s and 4m/s respectively. After the collision the direction of...

thank you for you help, but i can't get there, to be honest, i started studying after 15 years and this thing is doing my head, i have to handle my course work tomorroy, and I'm still half way.lollol

i've calculated wrong. it should have been. Magnitude = 1.05-(-1.4) = 2.45 2.45 is the final answer. kg m/s is the final answer given in N??

Homework Statement A ball of mass 350g is traveling with a speed of 4m/s when it hits at right angles a fixed vertical wall. The ball rebounds with a speed of 3m/s. Find the magnitude of the impulse exerted by the ball on the wall. Using a simple diagram show the direction of velocities and...

Homework Statement A ball of mass 350g is traveling with a speed of 4m/s when it hits at right angles a fixed vertical wall. The ball rebounds with a speed of 3m/s. Find the magnitude of the impulse exerted by the ball on the wall. Using a simple diagram show the direction of velocities and...

Man, what a minor detail, do you believe i got stuck in most of my equations because of that. I need to go back to basics. lololol Thank you very much

Thank you, but on the first question, nearly at the end, don't the -10 when it crosses over to the left stays as -20/10=t ?? 'couse like that iwould get an answer of -2s, what am i doing wrong

Homework Statement d) A stone is thrown upward with a velocity of 20m/s. Calculate: i) How long does it take for the stone to reach its highest point; ii) the maximum height it will achieve? Please help

ii) If the driver had not reacted immediately and the brakes were applied one second later, with what speed would the car have hit the tree? u=25 m/s a=-5 m/s2 s=65 m - (1 sec reaction time = 25 m/s) = 40 m? v=? same formula v2=252+(-5)40 v2=625+(-10)40 v2=625+(-400) v2=225 v=√225...

Thanks. This next one is a bit confusing, not so much the first part, its the second, i think i got it wright, i just don't know how to put it on peper to present it to the tutor. b) A car is being driven along a straight and level road at a steady speed of 25 ms-1 when the driver...

ii) If the driver had not reacted immediately and the brakes were applied one second later, with what speed would the car have hit the tree? u=25 m/s a=-5 m/s2 s=65 m - (1 sec reaction time = 25 m/s) = 40 m? v=? same formula v2=252+(-5)40 v2=625+(-10)40 v2=625+(-400) v2=225 v=√225...

Thanks. This next one is a bit confusing, not so much the first part, its the second, i think i got it wright, i just don't know how to put it on peper to present it to the tutor. b) A car is being driven along a straight and level road at a steady speed of 25 ms-1 when the driver...