Question

a body of mass 5kg at rest is acted upon by two mutually perpendicular forces 6N and 8N simultaneously.Its kinetic energy after 10 sec is

Answer 1

1this is your answer my handwriting is not good

Answer 2

"Net force, F 2=82+62  N

F2=100 N   and hence, F= 10N

Acceleration, a = F/m= 10/5= 2m/s2

The net force F make the angle Beta (b) with horizontal and the acceleration makes the angle beta (b) with the horizontal. This is because acceleration is always in the direction of force.

Tan b = 6/8 =3/4 = 0.75

b = tan-1(0.75) = 36.9o

"