Question

A car falls from a mountain road and comes to the ground in 0.8 seconds. (Let's say g = 10 ms^-2). What will be its speed when it hits the ground?
1. 5 ms^-1
2. 4 ms^-1
3. 01 ms^-1
4. 8 ms^-1

Answer 1

Correct Answer - Option 4 : 8 ms^-1

The correct answer is 8 ms-1

• Solution:
  • Here, u = 0 , t = 0.8 s , g = 10 m / s 2.
  • v = u + g t = 0 + 10 × 0.8
  • 8
  • 8 ms-1 is the speed when it hits the ground.