Block and Tackle System

Q.

Following type of pulley is known as a movable pulley.

1. True

2. False

Q.

Define the term "single fixed pulley". State its mechanical advantage and velocity ratio.

Q. Assertion :To unscrew a rusted nut, we need a wrench with longer arm. Reason: Wrench with longer arm reduces the torque of the arm.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Assertion is incorrect but Reason is correct

Q. The diagram alongside shows an arrangement of three pulleys $A,B$ and $C$. The load is marked as $L$ and the effort as $E$. Calculate the mechanical advantage and velocity ratio of the arrangement.

1. M.A.= 4, V.R.= 4
2. M.A.= 4, V.R.= 8
3. M.A.= 2, V.R.= 4
4. M.A.= 4, V.R.= 2