A 1000-kg car moving at 10 m/s brakes to a stop in 5 s. The average braking force is?
when i work this out with the formula that you gave me, i get 2525 instead of 2000 N
Momentum change = (braking force)*(time)
Force = M V /t
= 1000 * 10/5 = 2000 N
To calculate the average braking force, we can use the formula:
Average Braking Force = (Initial Momentum - Final Momentum) / Time
First, let's find the initial momentum of the car:
Initial Momentum = Mass × Velocity
= 1000 kg × 10 m/s
= 10,000 kg·m/s
Next, let's find the final momentum of the car:
Final Momentum = 0 kg·m/s (since the car comes to a stop)
Now, we can substitute the values into the formula:
Average Braking Force = (10,000 kg·m/s - 0 kg·m/s) / 5 s
= 10,000 kg·m/s / 5 s
= 2000 N
Therefore, the average braking force exerted on the car is 2000 N.
If you obtained a different answer, please check if you made any calculation errors or incorrectly substituted the values into the formula.