A bomb is dropped from an airplane moving horizontally with a speed of 200 km/h. If the air resistance is negligible, the bomb will reach the ground in 5 s, the altitude of the plane approximately is: (g = 9.8 m/s2)
Correct answer: C. 122.5 m
- A. 50 m
- B. 75 m
- C. 122.5 m
- D. 250 m
- E. 300 m
Explanation
Data:u = t = 5 sec v = 200km/hr Solution: h = ut + 1/2gt2h = 1/2 x 9.8(5)2h = 1/2 * 245= 122.5Hence, option C is correct.
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