Tag: pulleys

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Questions Related to pulleys

Multiple choice physics machines levers and pulleys pulley pulleys

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

  1. $x/2$

  2. $x$

  3. $4x$

  4. $2x$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Load $L$ is attached to the movable pulley. A rope is fi xed at a point in ceiling that passes through the moveable pulley. 
In order to lift the effort $E$ by $ x$ meters, the load $L$ needs to 
Travel the distance of $ x/2$ meters. (The entire rope needs to be pulled by $E$ for a distance of $ x$) 
Now, Velocity Ratio equals (Distance traveled by $E$) divided by (Distance traveled by $L$) 
So it becomes : $ x/( x/2)$. This equals to 2
Since it is a ratio. it has no units of measurement. 
Multiple choice physics machines levers and pulleys pulley pulleys

What is the velocity ratio of a single movable pulley?

  1. $1$

  2. $0.5$

  3. $2$

  4. $1.5$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Load $L$ is attached to the movable pulley. A rope is fixed at a point in ceiling that passes through the movable pulley.
In order to lift the load $L$ by $X$ meters, the effort $E$ needs to travel the distance of 2X meters. (The entire rope needs to be pulled by $E$ for a distance of 2X.)
Now, Velocity Ratio equals (Distance traveled by $E$) divided by (Distance traveled by $L$)
So it becomes : $2X/X$. This equals to 2
Since it is a ratio. it has no units of measurement.

Multiple choice physics machines levers and pulleys pulley pulleys

A pulley makes our work easier by changing the direction of the force.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A fixed pulley is primarily used to change the direction of the applied force, making it easier to pull a load downwards rather than lifting it upwards.

Multiple choice physics common machines levers and pulleys pulley pulleys

Levers, inclined planes and pulleys are called:

  1. Compound machines

  2. Complex machines

  3. Easy machines

  4. Simple machines
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
  1. A simple machine is a mechanical device that changes the direction or magnitude of a force. In general, they can be defined as the simplest mechanisms that use mechanical advantage (also called leverage) to multiply force. Levers,inclined planes and pulleys are called simple machines
Multiple choice physics machines levers and pulleys pulley pulleys

A single fixed pulley is equivalent to a :

  1. first order lever

  2. second order lever

  3. third order lever

  4. complex machine
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A single fixed pulley acts like a first-class lever where the axle is the fulcrum, the load is on one side, and the effort is on the other side.

Multiple choice physics a little effort, lot of work levers and pulleys pulley pulleys

In a wheel-and-axle :

  1. wheel rotates freely on axle

  2. wheel is fixed to the axle

  3. direction of the force remains same'

  4. mechanical advantage is always more than one
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In a wheel-and-axle, the wheel and the axle are rigidly connected so that they rotate together around the same axis.

Multiple choice physics machines levers and pulleys pulley pulleys

In a pulley :

  1. Load and effort are equal

  2. Load is greater than effort

  3. Load is less than effort

  4. Both have no relation
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In a single fixed pulley, the effort required is equal to the load (ignoring friction), as the mechanical advantage is 1.