JEE Main Physics question
The engine of a jet aircraft applies a thrust force of 10⁵ N during take off and causes the plane to attain a velocity of 1 km/sec in 10 sec. The mass of the plane is
Answer: (B)
Solution
Acceleration a = Δv/Δt = 1000/10 = 100 m/s². From F = ma: m = F/a = 10⁵/100 = 10³ kg.