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Question
A force of 5 N, making an angle `theta` with the horizontal, acting on an object displaces it by 0.8 m along the horizontal direction. If the object gains kinetic energy of 1 J, the horizontal component of the force is ____________.
Options
1.5 N
1.25 N
2.5 N
4.15 N
MCQ
Fill in the Blanks
Solution
A force of 5 N, making an angle `theta` with the horizontal, acting on an object displaces it by 0.8 m along the horizontal direction. If the object gains kinetic energy of 1 J, the horizontal component of the force is 1.25 N.
Explanation:
Work done on the body = K.E. gained by the body
Fs cos `theta` = 1 J
`therefore "F cos" theta = 1/"s" = 1/0.8 = 1.25 "N"`
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Work Energy Theorem
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