Question

An object of certain mass is dropped from the top of a
building of height 10 m. At a certain point on its path,
the ratio of its potential energy to its kinetic energy is
found to be 1:3. The work done by the gravitational
force of the earth in moving the body up to this point
is 225 J. Determine the mass of the object and the
kinetic energy when it reaches the ground. (Take g =
10 m -2)​

Answer 1

Answer:

% purity = mass of pure product / mass of impure product obtained* 100%

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