Briefly describe the importance of classification.
Briefly describe the importance of classification.
Importance of classification:
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Explain by an example what is meant by potential energy. Write down the expression for gravitational potential energy of a body of mass m placed at a height h above the surface of the earth.
The speed-time graph of an ascending passenger lift is given alongside.
What is the acceleration of the lift:

It has been observed that despite the availability of the vaccine for Hepatitis A in the market, it may not be necessary to be given to children by the time they are 5 years old. Why?
Mention three different ways in which insect pests can attack the crop plant.
Find the momentum of a body of mass 100g having a kinetic energy of 20J.