if the brakes of an automobile are applied from 70km/h to 35km/h, how many meters does the car travel during this deceleration?
More information is needed. The answer depends upon the deceleration rate.
To find out how many meters the car travels during the deceleration, we need to calculate the distance covered when the brakes are applied.
We can use the formula for distance traveled during constant deceleration:
distance = (initial velocity^2 - final velocity^2) / (2 * acceleration)
In this case, the initial velocity is 70 km/h, the final velocity is 35 km/h, and the acceleration is the deceleration. The acceleration is negative because it opposes the motion of the car.
First, let's convert the velocities from km/h to m/s:
- Initial velocity = 70 km/h = 70 * (1000 m / 3600 s) = 19.44 m/s
- Final velocity = 35 km/h = 35 * (1000 m / 3600 s) = 9.72 m/s
Now, let's substitute these values into the formula:
distance = (19.44 m/s)^2 - (9.72 m/s)^2 / (2 * acceleration)
The acceleration is not given in the question, so we don't have enough information to calculate the exact distance. To find the distance traveled, we need to know the deceleration of the car.