If a ball of mass 1 kg is falling from a height 10 m. What will be the kinetic energy of the ball when it hits the ground?( take g = 10 m/s²) and neglect air drag.

100J

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50J

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10J

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Solution

The correct option is A
100J

Initially, the ball has a potential energy which is later converted to kinetic energy.
Potential energy = 1 $\times$ 10 $\times$ 10 = 100 joules
When the ball reaches the bottom, all its potential energy is converted to kinetic energy so,
Kinetic energy = 100 joules.

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We know that If a ball of mass $1 k g$ is kept at a height $10 m$ possess potential energy $m g h$ i.e. $(1 \times 10 \times 10) = 100$ J. (Taking earth surface as reference, where m = mass of object, g = acceleration due to gravity, h = height of object from earth surface.) what will be the kinetic energy of the ball when the ball is allowed to freely fall from a height $10 m$ just before it hits the ground? (take g = 10 $m / s^{2}$ and neglect air drag)

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If a ball of mass 1 kg is falling from a height 10 m. What will be the kinetic energy of the ball when it hits the ground?( take g = 10 m/s2) and neglect air drag.

The correct option is A 100J Initially, the ball has a potential energy which is later converted to kinetic energy. Potential energy = 1×10×10 = 100 joules When the ball reaches the bottom, all its potential energy is converted to kinetic energy so, Kinetic energy = 100 joules.

If a ball of mass 1 kg is falling from a height 10 m. What will be the kinetic energy of the ball when it hits the ground?( take g = 10 m/s²) and neglect air drag.

The correct option is A
100J

Initially, the ball has a potential energy which is later converted to kinetic energy.
Potential energy = 1 $\times$ 10 $\times$ 10 = 100 joules
When the ball reaches the bottom, all its potential energy is converted to kinetic energy so,
Kinetic energy = 100 joules.