A truck that travels on a level road at 60 km/h can be stopped by its brakes in a distance of 51 m. The mass of the truck is 5 tonnes and the resistance against motion is 3 615 N.
Calculate the braking force in kN.
To calculate the braking force, we can use the equation:
Braking force = mass x acceleration
First, we need to calculate the acceleration of the truck using the equation:
Resistance force = mass x acceleration
3,615 N = 5,000 kg x acceleration
Acceleration = 3,615 N / 5,000 kg
Acceleration = 0.723 m/s^2
Now, we can calculate the braking force using the equation:
Braking force = mass x acceleration
Braking force = 5,000 kg x 0.723 m/s^2
Braking force = 3,615 N
Therefore, the braking force of the truck is 3.615 kN.