Question

Full explanation please I’m asking kindly

1. Thé speed of sound is 331 m/s. How much time will it take for the sound from a fire work explosion to travel 1 kilometer?
(Note: 1 km= 1000 meters)


2. An object that is originally moving at speed at 20 m/s accelerates uniformly for 5.0 seconds to a final speed of 50m/s. Calculate the acceleration of the object

Answer 1

1).

Time = (distance) / (speed)

Time = (1000 meters) / (331 m/s)

Time = 3.02 seconds

2).

Acceleration = (change in speed) / (time for the change)

Change in speed = (second speed) - (first speed)

Change in speed = (50 m/s) - (20 m/s) = 30 m/s

Acceleration = (30 m/s) / (5 seconds)

Acceleration = 6 m/s²