Two projectiles are thrown with the same initial speed, one at an angle θ with respect to the level ground and the other at angle 90° − θ. both projectiles strike the ground at the same distance from the projection point. are both projectiles in the air for the same length of time?

Height is different for both .

The time in air are different for both.

Step-by-step explanation:

Given that initial velocity is same

Lets take initial velocity = u

One at  an angle θ.

other at angle 90° − θ.

Also given that their range are same

We know that

sin(180° − θ)=sin θ

So

Height in the air

We know that

sin(90° − θ)=cos θ

From above we can say that height is different for both .

Time:

sin(90° − θ)=cos θ

The time in air are different for both.

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step-by-step explanation:

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~courtney