Applied Mechanics and Graphic Statics
For the given values of initial velocity of projection and angle of inclination of the plane, the maximum range for a projectile projected upwards will be obtained, if the angle of projection is

α = π/4 - β/2
α = π/4 - β/2
α = β/2 - π/2
α = π/2 + β/2

ANSWER DOWNLOAD EXAMIANS APP

Applied Mechanics and Graphic Statics
Kinetic friction may be defined as

Angle between normal reaction and resultant of normal reaction and limiting friction
Friction force acting when the body is just about to move
Ratio of limiting friction and normal reaction
Friction force acting when the body is in motion

ANSWER DOWNLOAD EXAMIANS APP