Asked by Anonymous,

A 2561-kg van runs into the back of a 823-kg compact car at rest. They move off together at 8.5 m/s. Assuming the friction with the road is negligible, calculate the initial speed of the van.
Answered by Damon
final momentum = initial momentum

(2561+823)(8.5)= 2561 V + 823 (0)
Answered by Mohammed
Final momentum = Initial Momentum
(2561+823)(8.5) = 2561V + 823(0)
(3384)(8.5) = 2561V
28764 = 2561V
11.23m/s = V
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