A projectile has maximum range of 40 m on a horizontal plane. If angle of projection is a and the time of flight is 1 second, then sin a must be about__________________?

Related Mcqs:

When two forces, each equal to P, act at 90° to each other, then the resultant will be_____________?

A. P B. PV2 C. P/V2 D. 2P...

One Newton is equivalent to________________?

A. 1 kg-wt B. 9.81 kg-wt C. 981 dyne D. 1/9.81 kg-wt...

Williot-Mohr diagram is used to determine deflection in__________________?

A. trusses only B. beam only C. rigid frames only D. any type of structure...

A ladder of weight ‘w’ rests against a smooth vertical wall, and rests on rough horizontal ground, the coefficient of friction between the ladder and the ground being 1/4. The maximum angle of inclination of the ladder to the vertical, if a man of weight ‘w’ is to walk to the top of it safely, is tan’1 x, where x is___________________?

A. 1/4 B. 1/3 C. 3 D. 4...

The maximum displacement of a particle executing S.H.M. corresponds to__________________?

A. zero potential energy and maximum kinetic energy B. zero kinetic energy and maximum potential energy C. maximum kinetic energy and maxi-mum potential energy D. minimum kinetic energy and minimum potential energy...