The acceleration of the body
"\\vec a=\\frac{\\Delta \\vec v}{\\Delta t}=\\frac{(8 {\\bf i}+3{\\bf j}-5{\\bf k})-(4 {\\bf i}-5{\\bf j}+3{\\bf k})}{10}=0.4 {\\bf i}+0.8{\\bf j}-0.8{\\bf k}"The Newton's second law sates
"\\vec F=m\\vec a""=40\\times (0.4 {\\bf i}+0.8{\\bf j}-0.8{\\bf k})=(16 {\\bf i}+32{\\bf j}-32{\\bf k})\\:\\rm N"
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Find the force needed to accelerate a mass of 40kg from velocity Vi=(4i-5j+3k)m/s to Vf=(8i+3j-5k)m/s in 10second.
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