calculate the acceleration of a motor which from rest 90km/h in 15 seconds?
I didn't hv the answer i want can u pls info in details
To calculate the acceleration of a motor, we use the formula:
acceleration (a) = change in velocity (Δv) / time taken (t)
First, let's convert the given velocity from km/h to m/s, as we need to work with SI units.
90 km/h = 90,000 m/3600 s = 25 m/s
Given that the motor starts from rest, its initial velocity (u) is 0 m/s.
Now, we can calculate the change in velocity (Δv) by subtracting the initial velocity from the final velocity.
Δv = 25 m/s - 0 m/s = 25 m/s
We are also given the time taken (t) as 15 seconds.
Now, we can substitute the values into the formula:
acceleration (a) = Δv / t
= 25 m/s / 15 s
= 5/3 m/s²
Therefore, the acceleration of the motor is approximately 1.67 m/s².
vel = at + c
at t = 0, vel = 0, it was at rest, so c = 0
vel = at
when t = 15 sec or 15/3600 hours, vel = 90 km/h
90 = a(1/240)
a = ... km/h^2 , you did not say what units you want.