M1 Problem

am I stupid or do I need to know if it is thrown vertically upwards or downwards? anyway, you'll have to think about g when solving the problem.

Reply 2

EconomyMan

OP

oh yh vertically upwards sorry

Reply 3

For question 1

s=ut + (at^2)/2

(I think that formula will do...but there are other ones as well)

For question 2

V=u+at

v=velocity
u=initial velocity
a=acceleration
t=time

Reply 4

Take up as positive. The initial speed is 16m/s (u = 16), time is 4 seconds (t = 4), and the acceleration is 9.8m/s^2 down (a = -9.8). h is a distance. Do you know the formula connecting u, a, t, and distance (normally x or s)? For the second part - do you know a formula connecting u, a, t and the final speed (v), or can you read the above post and copy the formula? :p:

Reply 5

EconomyMan

OP

hmm still nt sure

Reply 6

EconomyMan

hmm still nt sure

Oh, I see. You want me to do your work for you.

Not happening.

Reply 7

EconomyMan

OP

generalebriety

Oh, I see. You want me to do your work for you.

Not happening.

its not homework...im just doing it for revision...if i get a modell answer...i know what im working towards.

Reply 8

EconomyMan

its not homework...im just doing it for revision...if i get a modell answer...i know what im working towards.

You try it. I will guide you along the way if that's what you want. And when you've done that, I will provide you with a model answer and more examples if you're still not understanding. But I'd like you to try this, since it is revision and not learning.

Reply 9

I am not fond of solving whole problems either...

but I'll give you number 2...
(In White text)
v=u+at

a=-10m/s^2
t=4s
u=16m/s

hence v=-24m/s and as the question asks for speed and not velocity the answer is 24m/s

Reply 10

nota bene

I am not fond of solving whole problems either...

but I'll give you number 2...
(In White text)
v=u+at

a=-10m/s^2
t=4s
u=16m/s

hence v=-24m/s and as the question asks for speed and not velocity the answer is 24m/s

Why must people do this? I really don't understand it. Posting entire solutions helps no one. It's a waste of everyone's time.

Reply 11