Physics · Work done by a constant force and a variable force, kinetic and potential energies, work-energy theorem, power
Assertion A load when lifted vertically up requires greater effort than to roll
Assertion A load when lifted vertically up requires greater effort than to roll the same load up the ramp. Reason The work done in lifting the load vertically up is less.
- A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
- B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
- C. Assertion is correct but Reason is incorrect
- D. Both Assertion and Reason are incorrect
Step-by-step solution
The assertion is true because lifting vertically requires overcoming full weight, while a ramp reduces the required force. The reason is false because the work done against gravity is the same regardless of path (in the absence of friction), and with friction, work on the ramp is greater; thus, work done vertically is not less.
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