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Help me with this question please!
The question if from the M1 paper, May 2002, Question 5a.
A particle p of mass 2kg moves in a plane under the action of a single constant force of F newtons. At time t seconds, the velocity of P is v m/s2 . when t=0, v= (-5i +7j) and when t=3, v= (i - 2j).
Find in degrees the angle between the direction of motion of P when t=3 and the vector j.
*i can get 63.4 but in the answers they add 90. whys this?
Thanks for your help!!!
A particle p of mass 2kg moves in a plane under the action of a single constant force of F newtons. At time t seconds, the velocity of P is v m/s2 . when t=0, v= (-5i +7j) and when t=3, v= (i - 2j).
Find in degrees the angle between the direction of motion of P when t=3 and the vector j.
*i can get 63.4 but in the answers they add 90. whys this?
Thanks for your help!!!
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