Find the average force needed to accelerates a car weighing 500 kg from rest to 72 km/h in a distance of 25 m.

Question

Apoorva Arora · Answer

Here we use the third equation of motion. i.e. here s= 25 m v= 72 km/hr = 20 m/s u= 0 so a= 8 m/s (square) and hence the force is F=ma= 4000 N

Klyen Dave · Answer

This question can be solved more easily using the “Work – Energy Theorem” We know, W net = Δ K.E ∴ ∑F x s = ½ mv 2 - ½ mu 2 ∴ F x 24 = ½ x 500 x 20 2 ∴ F = 4000N

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Find the average force needed to accelerates a car weighing 500 kg from rest to 72 km/h in a distance of 25 m.

Find the average force needed to accelerates a car weighing 500 kg from rest to 72 km/h in a distance of 25 m.

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