A winch is turned by a wrench to lift a block 1 m in 10 s. Student 1 says a longer wrench reduces the average applied force; Student 2 says it reduces the work done; Student 3 says it reduces the required power.

Options

• Option A

  correct, because the torque that the wrench must exert to lift the block doesn't depend on the wrench's length.

• Option B

  correct, because using a longer wrench decreases the torque it must exert on the winch.

• Option C

  incorrect, because the torque that the wrench must exert to lift the block doesn't depend on the wrench's length.

• Option D

  Incorrect, because using a longer wrench decreases the torque it must exert on the winch.

Options

• Option A

  Student 2 and 3 are both correct

• Option B

  Student 2 is correct, but student 3 is incorrect

• Option C

  Student 3 is correct, but student 2 is incorrect

• Option D

  Student 2 and 3 are both incorrect

Options

• Option A

  
• Option B

  
• Option C

  
• Option D