What is the work of friction force when braking a car weighing 1500 kilograms from an initial speed of 72 km / h?
| September 8, 2021 | education
To find the value of the work of the friction force when braking the specified car, we use the formula: Atr = ΔEk = m * V0 ^ 2/2.
Values of variables: m – mass (m = 1500 kg); V0 is the speed of the specified vehicle before braking (V0 = 72 km / h = 20 m / s).
Calculation: Atr = m * V0 ^ 2/2 = 1500 * 20 ^ 2/2 = 300 * 103 J.
Answer: The frictional force during braking of the specified car performed work equal to 300 kJ.
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