An object of mass 25 kg is moving with a uniform velocity of 7 m $s^{- 1}$ . What is the kinetic energy possessed by the object?

512 J

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396.7 J

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258.3 J

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612.5 J

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Solution

The correct option is D 612.5 J
Mass of the object, m = 15 kg
Velocity of the object, v = 7 m $s^{- 1}$
Kinetic energy = $\frac{1}{2} m v^{2}$
= $\frac{1}{2}$ x 25 kg x 7 m $s^{- 1}$ x 7 m $s^{- 1}$
= 612.5 J
The kinetic energy of the object is 612.5 J

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An object of mass 25 kg is moving with a uniform velocity of 7 m s−1. What is the kinetic energy possessed by the object?

The correct option is D 612.5 JMass of the object, m = 15 kg Velocity of the object, v = 7 m s–1 Kinetic energy = 12mv2 =12 x 25 kg x 7 ms–1 x 7 ms–1 = 612.5 J The kinetic energy of the object is 612.5 J

An object of mass 25 kg is moving with a uniform velocity of 7 m $s^{- 1}$ . What is the kinetic energy possessed by the object?

The correct option is D 612.5 J
Mass of the object, m = 15 kg
Velocity of the object, v = 7 m $s^{- 1}$
Kinetic energy = $\frac{1}{2} m v^{2}$
= $\frac{1}{2}$ x 25 kg x 7 m $s^{- 1}$ x 7 m $s^{- 1}$
= 612.5 J
The kinetic energy of the object is 612.5 J