Stopping Within Distance | Dataford Interview Questions

If a car is traveling 15m/s and needs to stop within 15m, how much break force is required?

Assume constant deceleration, flat ground, and no drag or rolling resistance. Return the magnitude of the required braking force as a scalar. You may assume the car's mass is provided as input.

Function Signature

def required_brake_force(mass, speed, stopping_distance):

Input

mass: car mass in kilograms
speed: initial speed in meters per second
stopping_distance: distance available to stop in meters

Output

A number representing the braking force in newtons

Constraints

1 <= mass <= 10^5
0 < speed <= 10^3
0 < stopping_distance <= 10^5
Assume constant deceleration
Ignore drag, slope, and tire slip

Function Signature

def required_brake_force(mass, speed, stopping_distance):

Your question is Stopping Within Distance. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.

Problem

If a car is traveling 15m/s and needs to stop within 15m, how much break force is required?

Assume constant deceleration, flat ground, and no drag or rolling resistance. Return the magnitude of the required braking force as a scalar. You may assume the car's mass is provided as input.

Function Signature

def required_brake_force(mass, speed, stopping_distance):

Input

mass: car mass in kilograms
speed: initial speed in meters per second
stopping_distance: distance available to stop in meters

Output

A number representing the braking force in newtons

Constraints

1 <= mass <= 10^5
0 < speed <= 10^3
0 < stopping_distance <= 10^5
Assume constant deceleration
Ignore drag, slope, and tire slip

Function Signature

def required_brake_force(mass, speed, stopping_distance):

Your question is Stopping Within Distance. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.