(y³ + 3+) – ( 5 – 8y²) and this (6j + 8k) – (12k – 15j)
Answer:
Here, r
1
=3i+2j−6k and r
2
=14i+13j+9k
So, displacement, (r
2
−r
1
)=(14i+13j+9k)(3i+2j−6k)
=11i+11j+15k
Hence, work done
=F.s
=(4i+j+3k).(11i+11j+15k)
=44+11+45=100J
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