Movable Pulley

Q.

Instruments which help us to do our work easily are called simple machines.

1. True

2. False

Q. Which of the following statements is true about the picture given below?

1. The pulley X is fixed, while Y is movable.
2. The pulley Y is fixed, while X is movable.
3. Both the pulleys are movable.
4. Both the pulleys are fixed.

Q.

The pulley displayed below is known as a movable pulley.

1. True

2. False

Q. The helical threading of a screw :

1. increases the mechanical advantage
2. helps to gain less inclination
3. all of the above
4. holds the wood more firmly than a nail

Q.

A combination of a movable pulley $P_1$​ with a fixed pulley $P_2$​ is used for lifting up a load W. If the free end of the string moves through a distance x, find the distance by which the load W is raised.

1. x

2. 2 x

3. x/2

4. x²

Q.

In a single movable pulley, if the effort moves by a distance x upwards, by what height is the load raised?

1. $\frac{x}{5}$

2. $\frac{x}{4}$

3. $\frac{x}{2}$

4. $\frac{x}{8}$