Question

An object dropped from a cliff falls
with a constant acceleration of 10
m/s*s. Find its speed 5 s after it was
dropped.
vf means​

Answer 1

vf means final velocity

Given :-

◉ An object is dropped from a cliff falls with a constant acceleration a, a = 10 m/s²

To Find :-

◉ Speed after time t after it was dropped, t = 5s

Solution :-

Here, The acceleration is constant and the initial velocity is 0 m/s , Therefore, using first equation of motion we have,

⇒ v = u + at

⇒ v = 0 + 10 × 5

⇒ v = 50 m/s

Hence, The speed of the object after 5 seconds after falling would be 50 m/s.

Some Information :-

☛ Equations of motion works when the acceleration is constant for the whole time.

• s = ut + 1/2 at²
• 2as = v² - u²

Where, a = acceleration, v = final velocity, u = initial velocity, t = time taken, s = displacement