Question

Give one example of a machine for the use of changing the direction of force.

Answer 1

A machine can act as a direction changer:

1. A machine can act as a direction changer,i.e., the direction of effort can be changed to a convenient direction for ease of using a machine.
2. For a machine acting as a direction changer mechanical advantage(MA) is always equal to one and velocity ratio(VR) is also equal to one, as the displacement of load(d_L)is equal to the displacement of effort(d_E).

Pulley:

1. Example of a machine acting as a direction changer is using a pulley to hoist a flag.
2. It is a simple machine that is used to change the direction of the force.
3. When the wheel rotates, the cord can move in either the direction.
4. By attaching a hook to the cord, the wheel’s rotation can be used to raise or lower objects, making work easier.

Hence, the pulley is a simple machine acting as a direction changer.