Question

2
Q4 Which machines will you use to do the following works?
1) To hold a papad for roasting it
2) To im bricks to the top of a tall building
Q-5 Write unit of speed.
1
Q-6 Write unit of work and energy-
1
2
Q-7 Classify renewable and non renewable energy resources.
petrol solar energy natural gas wind energy, diesel,
dal energy.coal
Renewable
non renewable​

Answer 1

Explanation:

1.To hold a papad for roasting it- is flat tongs; a lever type machine

.2.The SI unit of speed is the metre per second, but the most common unit of speed in everyday usage is the kilometre per hour or, in the US and the UK, miles per hour.

3.The standard unit used to measure energy and work done in physics is the joule, which has the symbol J. In mechanics, 1 joule is the energy transferred when a force of 1 Newton is applied to an object and moves it through a distance of 1 meter.

4.All things that are useful to us are called resources. Air, water, land, soil, forest etc are all resources. Resources are useful raw materials that we get from nature. These are naturally occurring materials. They are useful for us in many ways, and we keep developing new ways to use them or convert them into useful things. Let us look at the classification of resources.