a car increase its speed from 20km/h to 50km/h in 10sec. find it's acceleration in m/s
Answers
It is given that the car increases its speed from 20 km per hour to 50 km per minute in 10 seconds.
It means that the initial velocity of the car is 20 km / hr.
And, the final velocity of the car is 50 km / hr
Since km can be written as 1000m and 1 hour can be written as ( 60 x 60 ) seconds.
Thus,
Initial velocity of the car = 20 km / hr = 20 x 1000 m / 3600 sec = 20000 m / 3600 s = 200 m / 36 s = 100 m / 18 s = 50 m / 9 s
And,
Final velocity of the car = 50 km / hr = 50 x 1000 m / 3600 s = 50000 m / 3600 s = 500 m / 36 s = 250 m / 18 s = 125 m / 9 s
From the properties of acceleration :
Acceleration = ( change in velocity ) / ( time taken for the change in velocities )
Therefore,
Acceleration = [ Final velocity - initial velocity ] / time taken
= > Acceleration = [ 125 / 9 - 50 / 9 ] / 10 x m / s²
= > Acceleration = 75 / 9 x 1 / 10 x m / s²
= > Acceleration = 75 / 90 x m / s²
= > Acceleration ≈ 0.83 m / s²
Hence,
Acceleration is 0.83 m / s² .
Answer:
acceleration is 0.003 m/s^2 . because unit of acceleration is m/s^2 . please see the image for explanation . I hope this answer is helpful for you please mark as brainliest .
