To solve the question regarding the function of a movable pulley, we can follow these steps:
### Step 1: Understand the Function of a Movable Pulley
A movable pulley is a type of pulley that can move up and down with the load. It is designed to make lifting easier.
**Hint:** Think about how pulleys work and what they are used for in lifting scenarios.
### Step 2: Determine the Mechanical Advantage
The mechanical advantage (MA) of a movable pulley is greater than 1. This means that the force needed to lift a load is less than the weight of the load itself.
**Hint:** Recall the formula for mechanical advantage, which is the ratio of load force to effort force.
### Step 3: Analyze the Force Required
With a movable pulley, you can lift a load by applying a force that is equal to half the load. This indicates that the pulley allows you to lift heavier loads with less effort.
**Hint:** Consider how much force you would need to apply to lift different weights with and without a movable pulley.
### Step 4: Identify the Role of the Movable Pulley
Since the movable pulley allows you to lift a load with less force, it acts as a force multiplier. This means it multiplies the input force, making it easier to lift heavy objects.
**Hint:** Think about the practical applications of pulleys in real life, such as cranes and elevators.
### Conclusion
A movable pulley is primarily used as a **force multiplier**.
**Final Answer:** The correct option is that a movable pulley is used as a force multiplier.
State whether the following statements are true or false by writing T or F. (a) The velocity ratio of a single fixed pulley is always more than 1. (b) The velocity ratio of a single movable pulley is always 2. (c) The velocity ratio of a combination of n movable pulleys with a fixed pulley is always 2^(n) . (d) The velocity ratio of a block and tackle system is always equal to the number of strands of the tackle supporting the load.
Give reasons for the following: (a) In a single fixed pulley, the velocity ratio is always more than the mechanical advantage. (b) The efficiency of a movable pulley is always less than 100%. (c) In case of a block and tackle system, the mechanical advantage increases with the increase in the number of pulleys. (d) The lower block of a block and tackle pulley system must be of negligible weight.
A single fixed pulley and a movable pulley both are separately used to lift a load of 50 kgf to the same height. Compare the efforts applied
Give two reasons why the efficiency of a single movable pulley is not 100%.
In the pulley system shown in figure the movable pulleys A,B and C are of mass 1 kg each D and E are fixed pulleys are light and inexensible. Choose the correct alternative (s).
In a single movable pulley, if the effort moves by a distance x upwards, by what height is the load raised ?
