Laws of Motion - Result Question 5

5. A body under the action of a force

F→=6i^−8j^+10k^, acquires an acceleration of 1m/s2. The mass of this body must be [2009]

(a) 10kg

(b) 20kg

(c) 102kg

(d) 210kg

Show Answer

Answer:

Correct Answer: 5. (c)

Solution:

  1. (c) F→=6i^−8j^+10k^,

|F→|=36+64+100=102N

(∵F=Fx2+Fy2+Fz2)

Given, a=1ms−2

∵F=ma⇒m=1021=102kg

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