Which of the following is the angle of projection of a projectile if its range is equal to its height?
Correct answer: D. 76
- A. 48
- B. 60
- C. 90
- D. 76
Explanation
This value should be learned for the exam because of the unavailability of calculators during the exam. There is a neat formula for the ratio of height to range: h/r=tanθ/4 So whatever angle has a tangent of 4, that's the angle that sets the ratio of height to range equal to exactly 1. tan−1(4)=75.96°
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Displacement, velocity and acceleration describe motion, including the horizontal and vertical components of projectile motion. The chapter connects these quantities with Newton's laws, momentum and impulse, then applies conservation of momentum to collisions, distinguishing elastic collisions from inelastic ones.
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