Melody

This will help you remember it

That is neat last anon - a little weird, but neat all the same. 

Yes, you are clever too anon :)

Thanks anon but that site does not provide any online help - not that I could see anyway - therefore it is useless to almost everybody on this forum.

Weight = mass * acceleration

so I  guess,

weight = 60*9.8 = 588 Newtons

I think pounds is a measure of mass, not weight 

Because it was written by a small, but intelligent, child :))

Well aren't you clever Chris :))

Thanks anon

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I always start these with an equilateral triangle of side length 2.    Angles will be 60 degrees

I then put in a height which will split the base in half.

Now you have 2 right angled triangles with hypotenuse=2 and base is 1 unit

using Pythagoras you can easily determine that the height is   $${\sqrt{{\mathtt{3}}}}$$ units.

The angles in each one will be 90,60 and 30 degrees.

now you can see that   sin(30) = 1/2

I draw this either on paper or in my head EVERY time.

Good one Sweaty   

Please can someone check this.

I do not know so I am going to guess. :)

F=mass* acceleration           m=2000kg

v=0, u=30m/s, t=0.72sec,  a=?

v=u+at

0=30+a*0.72

-30/0.72=a

a=-41.6 repeater  m/s^2

F=2000*41.66666

F=83333   kgm/s^2 = 83,333 Newtons     (to the nearest Newton)

tan-1 is atan