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30 J
375 Js (((((((((((: this is the right answer
Work done = increase in kinetic energy ie 1/2 * 10 * (3+2)(3-2) [recall a2 - b2 = (a+b)(a-b)] Hence work done = 25 joule.
Work done = Increase in kinetic energy SO W = (1/2) m (v22 - v12) So W = 12 x 5 x 3 = 180 J
Her average speed was 10 m/s. You probably missed something in the question, there isn't enough there to determine "how much it increased by".
1,500 J
10kg
1500 j
537.5 J
work=mass*speed,5*2=10
the increase from 7000 to 8000 is 1000
3000j
312.5 J
30 J
3000 J *Shelby Sarah*
750 j
375 Js (((((((((((: this is the right answer