A&R - Power and simple machines — task. Physics CBSE Live product, Class 9 (2026-27).

Solve the following Assertion–Reason based questions:

1. Assertion (A): A fixed pulley changes the direction of the effort.

Reason (R): A fixed pulley reduces the effort required to lift the load.

Both Assertion (A) and Reason (R) are true, and Reason (R) is the correct explanation of Assertion (A).
Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).
Assertion (A) is true, but Reason (R) is false.
Assertion (A) is false, but Reason (R) is true.

2. Assertion (A): The SI unit of power is joule.

Reason (R): The SI unit of power is watt.

Both Assertion (A) and Reason (R) are true, and Reason (R) is the correct explanation of Assertion (A).
Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).
Assertion (A) is true, but Reason (R) is false.
Assertion (A) is false, but Reason (R) is true.

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8. A&R - Power and simple machines

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