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A projectile is fired with a speed u at ...

A projectile is fired with a speed u at an angle `theta` with the horizontal. Find its speed when its direction of motion makes an angle `alpha` with the horizontal.

A

`usecthetacosalpha`

B

`usecthetasinalpha`

C

`ucosthetasecalpha`

D

`usinthetasecalpha`

Text Solution

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The correct Answer is:
C
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MOTION-PROJECTILE MOTION-EXERCISE-1
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  2. Two projectiles are thrown simultaneously in the same plane from the s...

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  3. Two projectivles are thrown simultaneously in the same plane from the ...

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  4. A ball is hit by a batsman at an angle of 37^(@) as shown in figure. T...

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  5. A projectile is fired with a speed u at an angle theta with the horizo...

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  6. A person is standing on a truck moving with a constant velocity of 14....

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  7. Two particles are projected from the same point with the same speed at...

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  8. A man on a moving cart, facing the direction of motion, thrown a ball ...

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  9. A particle is projected with velocity u at an angle alpha from a point...

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  10. One second after the projection, a stone moves at an angle of 45^@ wi...

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  11. In previous questions, the initial velocity of projection of stone is-

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  12. The equation of a projectile is y=sqrt(3)x-(gx^(2))/(2) the angle of...

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  13. The equation of projectile is y = 16 x - (5 x^2)/(4). Find the horizon...

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  14. The trajectory of a projectile fired horizontally with velocity u is p...

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  15. A cannon on a level plane is aimed at an angle theta above the horizon...

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  16. A projectile is thorwn with a velocity of 50ms^(-1) at an angle of 53^...

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  17. A projectile is thorwn with a velocity of 50ms^(-1) at an angle of 53^...

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  18. A projectile is thorwn with a velocity of 50ms^(-1) at an angle of 63^...

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  19. Trajectory of particle in a projectile motion is given as y = x - (x^(...

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  20. A particle moves along the positive branch of the curve y = (x^(2))/(2...

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