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Q: A car falls from the bridge to the ground in 0.8 seconds. What will be its speed at the time of hitting the ground? given (g) = 10ms⁻²
  • A. 8 ms⁻²
  • B. 8 ms⁻¹
  • C. 8 ms²
  • D. 8 ms¹
Correct Answer: Option B - Given, t = 0.8 second, Initial velocity (u) = 0 v = ? Newton first equation of motion due to gravity - v = u + gt v = 0 + 10 × 0.8 v = 8 m/s
B. Given, t = 0.8 second, Initial velocity (u) = 0 v = ? Newton first equation of motion due to gravity - v = u + gt v = 0 + 10 × 0.8 v = 8 m/s

Explanations:

Given, t = 0.8 second, Initial velocity (u) = 0 v = ? Newton first equation of motion due to gravity - v = u + gt v = 0 + 10 × 0.8 v = 8 m/s