# A body is projected upwards with a velocity of at an angle of 30° with the horizontal. Determine:(a) the time of flight;(b) the range of the body;(c) the maximum height attained by the body.

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α=30°

t=(2*u*sinα)/g

g=9.8 m/s²

t=2*30*sin30°/9.8

t=60*0.5/9.8

t=3.06 s

R=u²sin2α/g

R=(30)²sin60/9.8

R=900*√3/19.6

R=79.53m

Hmax=u²sin²α/2g

Hmax=(usinα)²/2g

Hmax=(30*0.5)²/19.6

Hmax=225/19.6

Hmax=11.47m