NEET 2016
- Exam
- NEET
- Year
- 2016
- Subject
- Physics
- Chapter
- Work, Power and Energy
NEET 2016 · Physics · Work, Power and Energy
A particle moves from a point (- 2 ^ i + 5 ^ j ) to (4 ^ j + 3 ^ k...
A particle moves from a point \left(- 2\overset{^}{i} + 5\overset{^}{j}\right) to \left(4\overset{^}{j} + 3\overset{^}{k}\right)when a force of \left(4\overset{^}{i} + 3\overset{^}{j}\right)N is applied. How much work has been done by the force?
Options
- A
- B
- C
- D
Correct answer
C.
Step-by-step solution
\overset{\to}{S} = \overset{\to}{r}2 - \overset{\to}{r}1 = \left(4\overset{^}{j} + 3\overset{^}{k}\right) - \left(- 2\overset{^}{i} + 5\overset{^}{j}\right)
= 2\overset{^}{i} - \overset{^}{j} + 3\overset{^}{k}
\overset{\to}{F} = 4\overset{^}{i} + 3\overset{^}{j}
= 2\overset{^}{i} - \overset{^}{j} + 3\overset{^}{k}
\overset{\to}{F} = 4\overset{^}{i} + 3\overset{^}{j}