A body of mass 4kg is subjected to a constant force f as a result of which its speed changes from 3m/s to 7m/s in a duration of 2 sec. the direction of motion of the body is not changing during its coarse of motion. change of magnitude of its momentum is
Answers 1
Firstly,
The rate of change of its momemtum is = Final momemtum -initial momemtum/Time taken
Final momemtum = Mass * Final velocity
= 4 * 7 = 28 kg m/s
Initial Momemtum = Mass * initial velocity
= 4 * 3 = 12 kg m/s
Therefore The change of magnitude of its momemtum is = Final momemtum -initial momemtum
= 28 - 12 =16 kg m/s
Change of momemtum is 12 N
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