Find the total stopping distance of a car with a braking force of 5000 N, a mass of 1000 kg and moving at a speed of 20 m/s.
Question
Find the total stopping distance of a car with a braking force of 5000 N, a mass of 1000 kg and moving at a speed of 20 m/s.
Solution
Sure, to find the total stopping distance of a car, we need to first find the deceleration of the car using the formula:
F = ma
where: F is the force applied, m is the mass of the object, and a is the acceleration (or in this case, deceleration).
Given that the braking force F is 5000 N and the mass m is 1000 kg, we can rearrange the formula to solve for a:
a = F/m = 5000 N / 1000 kg = 5 m/s²
This means the car is decelerating at a rate of 5 m/s².
Next, we use the formula for stopping distance:
d = (v²) / (2a)
where: d is the stopping distance, v is the initial speed, and a is the deceleration.
Given that the initial speed v is 20 m/s and the deceleration a is 5 m/s², we can substitute these values into the formula:
d = (20 m/s)² / (2 * 5 m/s²) = 400 m²/s² / 10 m/s² = 40 m
So, the total stopping distance of the car is 40 meters.
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