Advertisements
Advertisements
Question
Name six simple machines. Give an example of each machine.
Advertisements
Solution
Simple Machines and their examples are as follows:
- The lever: Examples are a crowbar, claw hammer, a pair of pliers, etc.
- The Inclined plane: Examples are ramp, staircase, hilly roads, etc.
- The wedge: Examples are knife, axe, plough, nail, etc.
- Screw: Examples are A screw.
- The wheel and axle: Examples are steering wheel of a car, bicycle pedal, etc.
- The pulley: Examples are a pulley used in raising a load.
APPEARS IN
RELATED QUESTIONS
Select the correct alternative:
For an ideal machine, the efficiency is
What care would you take to increase the life span of a machine which you use?
Answer the following.
What is a machine?
State the kind of lever which always has mechanical advantage less than 1. Draw a labelled diagram of such a lever.
Give an example where a machine is used to obtain gain in speed.
Write an expression to show the relationship between mechanical advantage, velocity ratio, and efficiency for a simple machine.
(i) Calculate the mechanical advantage of the lever shown in the figure.
(ii) How do you define the mechanical advantage of a machine?

A simple machine enables us to lift a load of 10,000 N by the application of an effort of 500 N. However, when the point of application of the effort moves through 2.5 m, the load gets raised through 10 cm only. What are the values of the:
(i) M.A.
(ii) V.R. and
(iii) Efficiency of the machine?
Name the levers mentioned in the following passage. Identify the fulcrum, load, and effort of each and say which type of lever it is.
Ravi and Savita sit on a seesaw in a garden. In the meantime, a gardener is trimming trees in the garden. He puts the leaves and other garbage in the wheelbarrow. Later, Ravi gets thirsty and he buys lemon sherbet. The sherbet seller cuts the lemon and squeezes it using a lemon squeezer. He puts small pieces of ice in the glass with the help of the tongs.
Rearrange the letters and find out the name of the tool.

R L E V E
| ______ | ______ | ______ | ______ |
