As level maths mechanics question - help!!!!

do you want to join a maths group? do you have instagram?

particle of mass 6 kg is initially at rest and is then acted upon by a force R = (ai+10j)N on a bearing of 300°.
a Find the exact value of a. (3 marks)
b Calculate the magnitude of R. (2 marks)
c Work out the magnitude of the acceleration of the particle. (2 marks)
d Find the time it takes for the particle to travel a distance of 640 m.

particle of mass 6 kg is initially at rest and is then acted upon by a force R = (ai+10j)N on a bearing of 300°.
a Find the exact value of a. (3 marks)
b Calculate the magnitude of R. (2 marks)
c Work out the magnitude of the acceleration of the particle. (2 marks)
d Find the time it takes for the particle to travel a distance of 640 m.

Have you sketched a diagram of the force with the horizontal and vertical components also drawn? Part a then comes down to a SOHCAHTOA

What are you stuck on?

part d - because im not sure if i have done part a b and c wrong

Can you post what you've got - I need to go out in 20 mins ...

a) a=4root3
b) R=8
c)acceleration = 4/3

I don't get the same for (a) a must be negative. Draw a triangle to help.

how do you know that a must be negative ??? what did u get ?

The bearing is 300 so the force must have a negative i - back later sorry

yeh i know i have done that - wait so wouldnt it just be -3root4

do you want to join a maths group? do you have instagram?

Yes

Please don't resurrect 2 year old threads for no reason. TSR does not allow sharing of external personal accounts including Instagram