Question

a truck ccelerates from 24m/s at constant rate 2.1m/s2 for 15sec. what is the final speed of the car at the end of the 15seconds.​

Answer 1

Answer:

55.55 m/s

Explanation:

Given :

• Initial velocity = u = 24 m/s

• Acceleration of the truck = a = 2.1 m/s²

• Time taken = t = 15 seconds

To find :

• Final velocity of the truck after 15 seconds

Using the first equation of motion :

V=u+at

V=24+(2.1×15)

V=24+31.5

V=55.5 m/s

The final velocity of the truck after 15 seconds is equal to 55.55 m/s

More :

First equation of motion = v = u+at

Second equation of motion = s = ut+½×at²

Third equation of motion = v²-u²=2as