An object with a mass of 49.8 pounds is moving with a uniform velocity of 30.9...

An object with a mass of 49.8 pounds is moving with a uniform velocity of 30.9 miles per hour. Calculate the kinetic energy of this object in joules

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Expert Solution

Ans. Mass = 49.8 lb = 22.5889 kg ; [1 lb = ‪0.453592 kg]

Velocity = 30.9 mile/ hr = 13.81354 ; [ 1 mile/h = 0.44704 m/s]

Now.

Kinetic energy of a particle, KE = ½ mv²

Where, m = mass in kg ; v = velocity in ms/

Or, KE = ½ (22.5889 kg) (13.81354 ms^-1)² = 2155.14 kg m² s^-2

Or, KE = 2155.14 J ; [1 kg m² s^-2 = 1 J]

Therefore, KE of the object = 2155.14 J

queen_honey_blossom answered 1 year ago

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