1) A particle having a mass of 0.5 kg is projected under gravity with a speed of 98 m/sec at an angle of 60°. The magnitude of the change in momentum (in N-sec) of the particle after 10 seconds is [g = 9.8 m/sec2] A) 0.5 B) 49 C) 98 D) 490 Answer: Option BExplanation:Change in momentum = F x t mg ×10 = 0.5 × 9.8 x 10 = 49 N-sec
