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4 āĻāĻ° āĻĻāĻžāĻā§āĻ° (ii) āĻāĻ° āĻ
āĻĨāĻŦāĻž āĻāĻ° (b)
āĻ§āĻ°āĻŋ, āĻāĻ°ā§āĻ§ā§āĻŦāĻŽā§āĻāĻŋ āĻŦāĻ˛ = F
āĻāĻ°ā§āĻ§ā§āĻŦāĻŽā§āĻāĻŋ āĻ¤ā§āĻŦāĻ°āĻŖ = a
āĻ
āĻāĻŋāĻāĻ°ā§āĻˇāĻ āĻ¤ā§āĻŦāĻ°āĻŖ, g = 9.8 m/s2
āĻĒā§āĻ°āĻĻāĻ¤ā§āĻ¤, āĻāĻ°, m = 49 kg
āĻĒā§āĻ°āĻļā§āĻ¨āĻžāĻ¨ā§āĻ¯āĻžāĻ¯āĻŧā§, g-a = 7.8 m/s2
āĻŦāĻž, a = g-7.8
= 9.8-7.8
= 2 m/s2
.'. āĻŦāĻ¸ā§āĻ¤ā§āĻāĻŋāĻ° āĻāĻĒāĻ° āĻāĻ°ā§āĻ§ā§āĻŦāĻŽā§āĻā§ āĻŦāĻ˛,
F = ma
= 49Ã2
= 98 N
= 98Ãˇ9.8 kgf ['.' 1kgf = 9.8N]
=10 kgf
1 369
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