A physics student drops a water balloon from an upstairs window. The window is 26.45 m
from the ground. How long does it take for the balloon to hit the ground? (Round to the
nearest tenth)
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Ответ:
Explanation:
Given:
Distance S = 26.45m
Using the equation of motion
S = ut+1/2gt²
26.45 = 0+1/2(9.81)t²
26.45 = 4.905t²
t² = 26.45/4.905
t² = 5.392
t = 2.528s
Hence the it took the balloon 2.52s to reach the ground
Ответ:
Initial velocity of spaceship (u) = 58 m/s
Final velocity of spaceship (v) = 153 m/s
Time taken (t) = 12 seconds
Since the spaceship moves with uniform acceleration,
Distance (d) = 1/2 (u + v) t = 1/2 (58 + 153) 12 = 1266 m