Question

A block is thrown upward with kinetic energy 1 J. if goes up to a maximum height of 1 M find the mass of block.

Answer 1

Answer:

The mass of the block, m = 102 g

Explanation:

The kinetic energy of the block, K.E = 1 J

The block is thrown upwards and it attains a maximum height of 1 m. At this maximum height, the block will come to a state of rest and its kinetic energy will fully be converted to potential energy. So we can say that,

the potential energy of the block, P.E = 1 J

The maximum height attained by the block, h = 1 m

The acceleration due to gravity, g = 9.8 m/s²

The equation to find the potential energy is:

P.E = mgh

⇒ m = P.E / gh

   m = 1 / (9.8 × 1)

   m = 0.102 Kg = 102 g