A rail car that weighs 28 N is accelerated at 3.6 m/s/s for 2.2 seconds. How muc

Question

A rail car that weighs 28 N is accelerated at 3.6 m/s/s for 2.2 seconds. How much work is done on the rail car? The acceleration is constant. Hint: this is a multiple step problem in which you must derive the variables needed to solve the problem in step one and then apply those values to the final solution of the problem in the last step. Stumped on exactly what to multiply/divide by what!
A rail car that weighs 28 N is accelerated at 3.6 m/s/s for 2.2 seconds. How much work is done on the rail car? The acceleration is constant. Hint: this is a multiple step problem in which you must derive the variables needed to solve the problem in step one and then apply those values to the final solution of the problem in the last step. Stumped on exactly what to multiply/divide by what!
A rail car that weighs 28 N is accelerated at 3.6 m/s/s for 2.2 seconds. How much work is done on the rail car? The acceleration is constant. Hint: this is a multiple step problem in which you must derive the variables needed to solve the problem in step one and then apply those values to the final solution of the problem in the last step. Stumped on exactly what to multiply/divide by what!

Explanation / Answer

F = ma = (28/9.81) x 3.6 = 10.275 N

d = 3.6 x 2.2^2/2 = 8.712 m

W = F.d = 89.52 J

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