Question

1. A brick is dropped from a high wall. a. What is its velocity after 5.0 s? b. How far does the brick fall during this time?​

Answer 1

Answer:

(I) 49m/s

(ii) 122.5m

Explanation:

Data obtained from the question include:

Time (t) = 5 s

Acceleration due to gravity (g) = 9.8 m/s²

(A) Determination of the brick's velocity.

Time (t) = 4 s

Acceleration due to gravity (g) = 9.8 m/s²

Velocity (v) =?

v = gt

v = 5× 9.8

v = 49 m/s

Thus, the brick's velocity after 4 s is 49m/s

B. Determination of how far the brick fall in 5 s.

Time (t) = 5 s

Acceleration due to gravity (g) = 9.8 m/s²

Height (h) =?

h = ½gt²

h = ½ × 9.8 × 5²

h = 5× 16

h = 122.5 m

Thus, the brick fall 122.5m during the time.