Question

A car falls off a ledge and drops to the ground
in 0.7 s. What is its speed on striking the ground?
Take g = 10 ms 2
7 m/s
14 m/s
0.7 m/s
1.4 m/s​

Answer 1

Answer:

(a) 7 m/s

Explanation:

Given:

Initial velocity (u) = 0 m/s

Time (t) = 0.7 seconds

Acceleration (a) = g = 10 m/s²

To find:

Final velocity (v)

Method to find:

v = u + at

⇒ v = 0 + (0.7*10)

⇒ v = 7 m/s

Hence, the speed of the car on striking the ground is 7 m/s.