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اول سؤال ماعرفت احلو

2.

A particle moving with initial velocity v =2iˆ 4 ˆj 0

r

m/s ,and

acceleration a = −1.93iˆ + 2.3 ˆj

r

m/s

2 , what is the x-component vx of the final velocity at t= 5 s ?

(a) -11.65 m/s (b) -7.65 m/s (c) 19 m/s (d) 15.5 m/s