1.

A 25kg box is pulled at a constant speed by a horizontal force on a horizontal floor .The coefficient of sliding friction between the box and the floor is 0.20.How much work is done in pulling the box through 20m?

Answer»

⛦Hᴇʀᴇ Is Yoᴜʀ Aɴsᴡᴇʀ⚑
▬▬▬▬▬▬▬▬▬▬▬▬☟

WORK = force × displacement cosθ

➧ Force of friction =
Coefficient of friction × normal reaction
➾ 0.2 × mg

➾ 0.2 × 25 × 10
➾ 50 N

➧ Force × displacement

50N × 20 m
➾ 1000 J ...✔

_________
Thanks...✊



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