Simple Machines
Simple Machines: Overview
In this topic, we will learn the role and use of simple machines in our daily life. We will also understand the principle of working of a machine and how simple machines work in coordination with its different parts.
Important Questions on Simple Machines
Mechanical advantage , Load and effort are related as :
To gain speed, a toy motor car uses the gear principle.
Can a gear system used to gain the speed in a toy car? Explain.
A man opens a nut by applying a force of 150 N by using a lever handle of length 0.4 m. What should be the length of handle if he wants to open it applying a force of 60 N ?
The resistance offered by a lemon when an effort of 0.06 N is applied. The effort arm of the squeezer is 10 cm and the load arm is 3 cm. In the length, assume that the effort is applied at the end of the effort arm.
A gear system can be used to obtain a gain in torque if its gear ratio is _____ one.
A gear system cannot be used to obtain a gain in torque.
Is a gear system being used in an automobile? Explain.
A gear system is also used for changing the direction of rotating shafts.
What are the advantages of a fixed and movable pulley system? Explain with a diagram.
How can the gear system be used to change the direction of rotation?
How can a gear system be used to get a gain in speed?
How can a gear system be used to obtain a gain in torque? Explain with an example.
Explain the relation of the weight of the pulley with the mechanical advantage.
