What average net force is required to stop .

[EMPhotography]

What average net force is required to stop...

1. a 1500 kg vehicle is traveling at 75km/h. what is the average net force required to stop the vehicle within a 4.0 second interval?



2. f=ma? but i don't know acceleration?



3. force = 1500x (75/4) ?

 

[hage567]

1. a 1500 kg vehicle is traveling at 75km/h. what is the average net force required to stop the vehicle within a 4.0 second interval?



2. f=ma? but i don't know acceleration?



3. force = 1500x (75/4) ?

You can find the acceleration with the information they give you in the problem. Look up the definition of acceleration. Also remember to make sure your units are consistent throughout your calculations.

 

[kerimek]

1. The average net force required to stop the vehicle can be calculated by using the formula F=ma, where F is the net force, m is the mass of the vehicle, and a is the acceleration. In this case, the mass of the vehicle is 1500 kg and the initial velocity is 75 km/h (which needs to be converted to m/s). We also know that the vehicle needs to stop within a 4.0 second interval, so the final velocity will be 0 m/s. Therefore, the acceleration can be calculated as (0-75)/4 = -18.75 m/s^2. Plugging in these values into the formula, we get F= 1500 kg x (-18.75 m/s^2) = -28,125 N. This means that an average net force of 28,125 N is required to stop the vehicle within a 4.0 second interval.

2. In order to calculate the net force, we need to know the acceleration. However, we can use the formula v = u + at, where v is the final velocity, u is the initial velocity, a is the acceleration, and t is the time. In this case, we know the initial velocity (75 km/h) and the time interval (4.0 seconds), and we can find the final velocity (0 m/s) since the vehicle needs to stop. Rearranging the formula, we get a = (v-u)/t = (0-75)/4 = -18.75 m/s^2. Now, we can use the formula F=ma to calculate the net force.

3. The formula used in this response is incorrect. The correct formula for average net force is F=ma, where F is the net force, m is the mass, and a is the acceleration. In this case, the net force required to stop the vehicle is not equal to the mass of the vehicle multiplied by the velocity. It is important to use the correct formula when solving physics problems.