Applied Mechanics - Engineering

Q1:

A projectile is fired with a velocity of 100.3 m/sec. at an elevation of 60°. The velocity attained by the projectile when it is moving at a height of 100 m, is

A 70 m/sec.

B 75 m/sec.

C 80 m/sec.

D 85 m/sec.

E 90 m/sec.

ANS:E - 90 m/sec.

The velocity of a projectile a height h is given by:

v = sqrt(u^2 - 2gh).
v = sqrt(100.3^2 - 2*9.81*100).
v = 90 m/sec.