An object of mass 10 kg is projected from ground with speed 40 m/s at an angle $60^{o}$ with horizontal. The rate of change of momentum of object one second after projection in SI unit is [Take $g = 9.8 m / s^{2}$ ]

Question

An object of mass 10 kg is projected from ground with speed 40 m-s an angle 60o with horizontal- The rate of change of momentum of object one second after projection in SI unit is -Take g-9-8m-s2-

Toppr Admin · Accepted Answer

After 1 secux remains same-ucos60-x2218-40-xD7-12-20u-x2032-y-usin60-x2218-x2212-g-1-

An object of mass 10 kg is projected from ground with speed 40 m/s at an angle 60o with horizontal. The rate of change of momentum of object one second after projection in SI unit is [Take g=9.8m/s2]

After 1 secux remains same=ucos60∘=40×12=20u′y=usin60∘−g(1)

An object of mass 10 kg is projected from ground with speed 40 m/s at an angle $60^{o}$ with horizontal. The rate of change of momentum of object one second after projection in SI unit is [Take $g = 9.8 m / s^{2}$ ]

After $1$ sec
$u_{x}$ remains same
$= u c o s 60^{\circ} = 40 \times \frac{1}{2} = 20$
$u_{y}^{'} = u s i n 60^{\circ} - g (1)$