An iceboat is at rest on a frictionless frozen lake a sudden wind exerts a const

Question

An iceboat is at rest on a frictionless frozen lake a sudden wind exerts a constant force of 250 N, toward the east, on the boat. Due to the angle of the sail, the wind causes the boat to slide in a straight line for a distance of 6.0 m in a direction 25degree north of east. What is the kinetic energy of the iceboat at the end of that 6.0 m ? Number units the tolerance is +/- 2% By accessing this Question Assistance, you will learn you earn points based on the point potential policy by your instructor.

Explanation / Answer

As per law of conservation of energy,

Work done = Change in Kinetic energy

Initial kinetic energy = 0

Hence, work done = Final kinetic energy

Work done W = F*d*cos(theta)

W = 250*6*cos(25*) = 250 * 6 *0.9063

W = 1359.45 J

Hence K.E. = 1359.45 J

If you require answer in 1 decimal then answer will be 1359.4 J and without decimal then 1359 J

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