Q. 2

# Two objects are thrown up at angles of 45 and 60 respectively with the horizontal. If both objects attain the same vertical height, then the ratio of the magnitude of velocities with which these are projected is?

Answer :

Maximum height attained in a projectile motion:

Where Ɵ is the angle of projection

Here, there are two objects A and B

Let velocity of A be and that of B be.

Now it is given that

Since both attain same height, so:

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PREVIOUSA motor car is going due north at a speed of 50 kmh–1. It makes a 90° left turn without changing the speed. The change in the velocity of the car is about:NEXTA body is projected with a velocity of 40 ms–1. After 2s it crosses a vertical pole of height 20.4m. Calculate the angle of projection and horizontal range.

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