### Unit 06 Gravitation

As a student, it is very important to understand the basics of every single topic. Making student study for long hours is one of the most difficult tasks as they have a very short attention. Worksheets are a great tool for practicing, and practice often helps student understand concepts better and deeper, hence student should solve maximum worksheet for better understanding of the topics.

Below are given worksheets for sixth unit which cover following topics Keplar's laws of planetary motion. The universal law of gravitation. Acceleration due to gravity and its variation with altitude and depth.

Gravitational potential energy and gravitational potential. Escape velocity. Orbital velocity of a satellite. Geo-stationary satellites. First we are providing key notes and important questions from the unit, so student can get a quick review of the chapter and then important worksheet.

Key Notes and important question

Gravitation worksheet 01

Gravitation worksheet 02

Gravitation worksheet 03

Go to next section for worksheets related to Elastic behavior, Stress-strain relationship, Hooke's law, Young's modulus, bulk modulus, shear modulus of rigidity, Poisson's ratio; elastic energy.

Pressure due to a fluid column; Pascal's law and its applications (hydraulic lift and hydraulic brakes). Effect of gravity on fluid pressure. Viscosity, Stokes' law, terminal velocity, streamline and turbulent flow, critical velocity. Bernoulli's theorem and its applications.

Surface energy and surface tension, angle of contact, excess of pressure across a curved surface, application of surface tension ideas to drops, bubbles and capillary rise. Heat, temperature, thermal expansion; thermal expansion of solids, liquids and gases, anomalous expansion of water.