Question

Why work done by tension force is zero in pulley system?

plz answer...​

Answer 1

Explanation:

Let us consider a system

(refer pic)

where,

there is 2 block on simple pulley system

One is of 2kg and another will be of 4kg

Here acceleration of 4kg block will be downwards and acceleration of 2kg block will upwards

Here length of string will not gonna change..

When 4kg block is going down then 2 kg block is also coming up So therefore Work done by tension is zero..

Answer 2

Answer:

because force is normal to displacement but in opposite directions

Explanation:

aap pulley ke string Ko niche kich rahe ho balti uthane ke liye r tumhara balti upar uthta hua aata hai .Matlab string ko AAP hat se niche kich rahe ho or balti upar uthta hai yaniki tumhare hat force ka kam karta hai or balti upar me uthta hai Jo ki displacement hai .here force ka or displacement ka direction opposite hai parantu boh normal vi hai iske liye work done by tension is zero

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