a force f is applied on an object and its displaced by the distance d give expression for work done when angle between force and displacement are degree (i) 0 degree (ii) 180 degree specify whether the work done is positive or negative in each case
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1) WORK DOME +VE
FORCE =MASS x ACCLERATION SIN 0 (SIN 0=1)
2)WORK DONE -VE
FORCE =MASS x ACCLERATION SIN 180 (SIN 180=-1)
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w= fd cos0°
w= fd becoz = cos0°=1
w=fd
if cos180°
w=fd cos180°
cos180°=0
w=0
becoz f is going opposite that mean here is work not happen
w= fd becoz = cos0°=1
w=fd
if cos180°
w=fd cos180°
cos180°=0
w=0
becoz f is going opposite that mean here is work not happen
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