Question

A body of mass 0.5 kg is projected under gravity with a speed of 98 m/s at an angle of 30^o with the horizontal. The change in momentum (in magnitude) of the body is

• A. 24.5 N–s
• B. 49.0 N–s
• C. 98.0 N–s
• D. 50.0 N–s

Answer 1

Answer: (B)

49.0 N–s

Answer 2

Change in momentum between complete projectile motion = 2mu sinθ $= 2 \times 0.5 \times 98 \times \sin 30{^\circ}$= 49 N–s.