A car travels in a straight line for 3.9 h at a
constant speed of 83 km/h .
What is its acceleration?
Answer in units of m/s2
If v=const, acceleration =0
To find the acceleration of the car, we need to know its change in velocity and the time it took for that change to occur.
Acceleration (a) is defined as the rate of change of velocity, expressed as meters per second squared (m/s^2).
In this case, the car travels in a straight line at a constant speed of 83 km/h for 3.9 hours. We need to convert the speed from km/h to m/s and the time from hours to seconds to match the SI units.
1 km = 1000 m, so 83 km is equal to 83,000 m.
1 hour = 3600 seconds, so 3.9 hours is equal to 3.9 × 3600 = 14,040 seconds.
Now, we can find the acceleration by dividing the change in velocity by the time taken:
Acceleration (a) = Change in velocity / Time taken
Since the car is traveling at a constant speed, the change in velocity is zero. Therefore, the acceleration of the car is 0 m/s^2.
Thus, the answer to the question is that the car's acceleration is 0 m/s^2.