A 2200 kg truck traveling north at44 km/h turns east and accelerates to58 km/h.

Question

A 2200 kg truck traveling north at44 km/h turns east and accelerates to58 km/h. (a) What is the change in the truck's kineticenergy?
1 J

(b) What is the magnitude of the change in the linear momentum ofthe truck?
2 kg·m/s

(c) What is the direction of the change in the linear momentum ofthe truck?
3° (measuredclockwise from east) (a) What is the change in the truck's kineticenergy?
1 J

(b) What is the magnitude of the change in the linear momentum ofthe truck?
2 kg·m/s

(c) What is the direction of the change in the linear momentum ofthe truck?
3° (measuredclockwise from east)

Explanation / Answer

The change in kinetic energy = 0.5 * 2200kg ( (16.11m/s )2 - (12.22 m/s)2 ) = 121188J The change in linear momentum = 2200kg (16.11 m/s - 12.22 m/s ) = 8553 J Direction = tan-1 (12.22 / 16.11) = 37.18o

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