class 9th questions physics lesson 9
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
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class 9th questions physics lesson 9
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