Question

A cart falls from a track with an acceleration of 10 m/s2 (which is always the acceleration due to gravity). If it falls for 9 seconds before hitting the ground, what is it’s velocity at impact? (show work plz)

Answer 1

90m/s

Step-by-step explanation:

Answer 2

90m/s

Step-by-step explanation:

Given parameters:

Acceleration = 10m/s²

Time of fall = 9s

Unknown:

Final velocity = ?

Solution:

We can assume that the cart falls from rest.

Initial velocity = 0m/s

Using

v = u + gt

v is the final velocity

u is the initial velocity

g is the acceleration due to gravity

t is the time

v = 0 + 10 x 9 = 90m/s