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Grade: upto college level

                        

A railway flat car is rushing along a level frictionless track at a speed of 45 m/s. Mounted on the car and aimed forward is a cannon that fires 65-kg cannon balls with a muzzle speed of 625 m/s. The total mass of the car, the cannon, and the large supply of cannon balls on the car is 3500 kg. How many cannon balls must be fired to bring the car as close to rest as possible?

5 years ago

Answers : (1)

Deepak Patra
askIITians Faculty
471 Points
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Therefore, firing away 4 cannon balls would bring the system at rest.
5 years ago
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