an ice block is projected vertically up with a velocity 20m/s the amount of ice that melt when it reaches the ground and if the loss of p.e is converted into heat energy
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An ice block is projected vertically up with a velocity 20m/s .
at maximum height velocity of block becomes zero then, change in kinetic energy = change in potential energy = Heat energy
initial kinetic energy = 1/2 mv²
= 1/2 × m × (20)²
= 200m
kinetic energy at maximum height,
final kinetic energy = 1/2 m(0)² = 0
change in kinetic energy = 200m [ in magnitude]
so, change in kinetic energy from ground to top = change in potential energy from top to ground = Heat energy
=> 200m = m'Lf [ Lf is latent heat of fusion]
=> m' = 200m/Lf
where m is initial mass of block and Lf is latent heat of fusion.
at maximum height velocity of block becomes zero then, change in kinetic energy = change in potential energy = Heat energy
initial kinetic energy = 1/2 mv²
= 1/2 × m × (20)²
= 200m
kinetic energy at maximum height,
final kinetic energy = 1/2 m(0)² = 0
change in kinetic energy = 200m [ in magnitude]
so, change in kinetic energy from ground to top = change in potential energy from top to ground = Heat energy
=> 200m = m'Lf [ Lf is latent heat of fusion]
=> m' = 200m/Lf
where m is initial mass of block and Lf is latent heat of fusion.
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