5 kg ki a vashtu 10m/sec ke beg se gatiman hi ese rokne ke liye 20N ka bal lagaya jata hi kar rukne me kitna smay lagega

F = ma

F= 20 N
m = 5 kg

इसलिये

20 = 5 a

or

a = 20/5 = 4 m/s^2

वस्तु के लिए

u = 10 m/s
v = 0 m/s
a = 4 m/s^2

v = u + at के प्रयोग से

0 = 10 + 4 t

or

t = 10/4 = 2.5 seconds