Question: please help4andnbspandnbspandnbspandnbspandnbspandnbspthree vectors are given byandnbspaandnbsp 3iandnbspbandnbsp 1iandnbsp1jandnbspandandnbspcandnbsp 4j find...

Please help

4.      Three vectors are given by A = 3i, B = -1i +1j and C = 4j. Find the magnitude of the resultant vector. 

 

(a) 6.3 

(b) 5.4 

(c) 5.0 

(d) 2.3 

(e) 1.1 

(f)  0.5 

 

5.      A car has an initial velocity of 2.5 m/s. After displacement of 15 m, its velocity becomes 5.0 m/s. Find the acceleration of the car. 

 

(a) 0.525 m/s²

(b) 0.625 m/s² Answer

(c) 0.425 m/s²

(d) 0.225 m/s²

(e) 0.125 m/s²

(f)  0.825 m/s²