how 2option is occured
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Well, we know that
F=ma
=m (v-u)/t..........eq1
Here,
u is 60
v is -60 {opposite direction of u vector}
t is 0.02
m is 50*10^-3
Putting them in eq1,
F = -300N
The negative sign here shows that the direction of force is opposite to +X which is -X....
Hope you find this useful.... Comment in case of doubt
F=ma
=m (v-u)/t..........eq1
Here,
u is 60
v is -60 {opposite direction of u vector}
t is 0.02
m is 50*10^-3
Putting them in eq1,
F = -300N
The negative sign here shows that the direction of force is opposite to +X which is -X....
Hope you find this useful.... Comment in case of doubt
sumanth2001:
tq bro its clear now...
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