Question

a projectile is fired at 30°to the horizontal. the vertical component of its velocity is 80 ms^-1. its time of flight is T . what will be the velocity of the projectile at t=T/2
a)80 ms^-1
b)80 root 3 ms-1
c)(80/root 3) ms^-1
40 ms^-1​

Answer 1

Answer:

a projectile is fired at 30°to the horizontal. the vertical component of its velocity is 80 ms^-1. its time of flight is T . what will be the velocity of the projectile at t=T/2

a)80 ms^-1

b)80 root 3 ms-1

c)(80/root 3) ms^-1

40 ms^-1

Check out the attachment

Explanation:

• at total time of flight vertical displacement is zero
• at half of the time of flight the maximum height is there
• at maximum height the vertical component of the velocity is always zero
• only horizontal component remains
• therefore we can calculate the horizontal component at two half of a time of flight or at the maximum height

Answer 2

b is right ans

Explanation:

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