The range of projectile will be maximum for a given velocity of projectile, when the angle of projection (α) is β/2 30° + β/2 60° + β/2 45° + β/2 TRUE ANSWER : ? YOUR ANSWER : ?
Efficiency of a screw jack is given by (where α = Helix angle, and φ = Angle of friction.) tanα/tan (α + φ) None of these tan(α + φ)/tanα tan(α - φ)/tanα TRUE ANSWER : ? YOUR ANSWER : ?
The periodic time of one oscillation for a simple pendulum is (where l = Length of the pendulum.) 2π. √(l/g) (1/2π). √(l/g) (1/2π). √(g/l) None of these TRUE ANSWER : ? YOUR ANSWER : ?
The overturning of a vehicle on a level circular path can be avoided if the velocity of vehicle is __________ √(gra/h) None of these Less than Greater than Equal to TRUE ANSWER : ? YOUR ANSWER : ?
An ideal machine is one whose efficiency is Between 70 and 80% Between 60 and 70 % Between 80 and 90% 1 TRUE ANSWER : ? YOUR ANSWER : ?
During elastic impact, the relative velocity of the two bodies after impact is __________ the relative velocity of the two bodies before impact. Greater than Equal and opposite to Less than Equal to TRUE ANSWER : ? YOUR ANSWER : ?
The friction experienced by a body, when at rest, is known as Static friction Limiting friction Coefficient of friction Dynamic friction TRUE ANSWER : ? YOUR ANSWER : ?
For a self locking machine, the efficiency must be Greater than 50% Less than 50% Equal to 50% 1 TRUE ANSWER : ? YOUR ANSWER : ?
The linear velocity of a body rotating at ω rad/s along a circular path of radius r is given by ω.r ω².r ω²/r ω/r TRUE ANSWER : ? YOUR ANSWER : ?
The coefficient of friction depends upon Shape of the surfaces Nature of surfaces All of these Area of contact TRUE ANSWER : ? YOUR ANSWER : ?