![]() ![]() Solve the question using the initials mentioned in the question. So don’t get confused by the initialization. Generally, we use P (rho) as the symbol for density but in this question it is denoted by symbol p. Note This expression can also be used at and within the earth at distance R from the centre of the earth. Make a pendulum by tying a small mass (such as a nut) to a piece of cotton. Finally substitute, mass and volume in the equation which states that the ratio of mass to volume gives us density.Īcceleration due to gravity on earth is given as, Determining acceleration due to gravity, g, from a pendulum swing. Rearrange the equation and find the formula for mass. At the Equator, the Earth's gravity is 9.780 m/s 2 and at the poles it is 9.Hint Write down the equation for acceleration due to gravity.
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