Kinematics Question 298

Question: A force vector applied on a mass is represented as F=6i^8j^+10k^ and accelerates with 1 m/s2 . What will be the mass of the body in kg. [CMEET 1995]

Options:

A) - 2

B) 8

C) - 7

D) - 8

Show Answer

Answer:

Correct Answer: D

Solution:

For perpendicular vector A.B=0
therefore (5i^+7j^3k^).(2i^+2j^ak^)=0
therefore 10+14+3a=0
a=8



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