A car weighing 12,500 N starts from rest and accelerates to $83.0 \mathrm{km} / \mathrm{h}$ in $5.00 \mathrm{s}$. The friction force is 1350 N. Find the applied force produced by the engine.
Added by Madeline L.
Step 1
We know that 1 km = 1000 m and 1 hour = 3600 s. So, 83.0 km/h = 83.0 * 1000 / 3600 = 23.06 m/s. Show more…
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(a) Calculate the force needed to bring a 950-kg car to rest from a speed of 90.0 km/h in a distance of 120 m (a fairly typical distance for a non-panic stop). (b) Suppose instead the car hits a concrete abutment at full speed and is brought to a stop in 2.00 m. Calculate the force exerted on the car and compare it with the force found in part (a).
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