Projectile Motion
A projectile is fired at 20 m/s at 30° above horizontal. Time of flight (g=10 m/s²) is:
Select the correct option:
Solution
2.0 s
For a projectile fired with initial velocity u at an angle θ, the time of flight T is given by: T=g2usinθ Given:
- u=20 m/s
- θ=30∘⟹sin30∘=0.5
- g=10 m/s2 Substituting the values: T=102×20×0.5=1020=2.0 s.
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About This Question
- Subject
- physics
- Chapter
- kinematics
- Topic
- projectile motion
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
2.0 s
For a projectile fired with initial velocity u at an angle θ, the time of flight T is given by: T=g2usinθ Given:
- u=20 m/s
- θ=30∘⟹sin30∘=0.5
- g=10 m/s2 Substituting the values: T=102×20×0.5=1020=2.0 s.
This easy difficulty physics question is from the chapter kinematics, covering the topic of projectile motion. It appeared in the 2025 exam.
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