Solve this: 15 A particle moves through the origin of an xy-cordinate system at t=0 with initial - Maths - Vector Algebra

Question

Solve this:
15 A particle moves through the origin of an
xy-cordinate system at t=0 with initial velocity u=4i-5j m/s The
particle moves in the xy plane with an acceleration a=2i
m/s2 Speed of the particle at t=4 second is:
(1) 12 m/s (2) 8 2 m/s (3) 5 m/s (4) 13
m/s

Muskaan Talwar · Accepted Answer

Dear Student,

v=u+atv=4i-5j+2i4=12i-5jThus speed =v=122+-52=144+25=169=13 m/sThus option 4 is correct

Hope this information will clear your doubts about topic

Regards

Solve this: 15. A particle moves through the origin of an xy-cordinate system at t=0 with initial velocity u=4i-5j m/s. The particle moves in the xy plane with an acceleration a=2i m/s2. Speed of the particle at t=4 second is: (1) 12 m/s (2) 8 2 m/s (3) 5 m/s (4) 13 m/s

Solve this:

15. A particle moves through the origin of an xy-cordinate system at t=0 with initial velocity u=4i-5j m/s. The particle moves in the xy plane with an acceleration a=2i m/s². Speed of the particle at t=4 second is:
(1) 12 m/s (2) $8 \sqrt{2}$ m/s (3) 5 m/s (4) 13 m/s