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CBSE Class 9 Answered

a force of 30n act on a body of mass 10kg at rest on a smooth surface . what will be the velocity of the body after 5 seconds  
Asked by 291170634956051 | 27 Aug, 2018, 06:00: PM
answered-by-expert Expert Answer
F = 30 N
m=10 kg
a= ?
u=0 (initially body is at rest)
v= ?
t= 5 s
F = ma
a= 30/10 = 3 m/s2
 
According to the first equation of motion,
v = u + at
v= 0 + (3) x (5)
v = 15 m/s
Thus, the velocity of a body after 5 seconds is 15 m/s
Answered by Shiwani Sawant | 28 Aug, 2018, 01:04: PM

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