Car A and car B take part in a race around a circular track. One lap of the track measures 7.6 km.
Car A takes 2 minutes and 40 seconds to complete each lap of the track.
Car B takes 2 minutes and 25 seconds to complete each lap of the track.
Both cars travel at a constant speed.
(a) Calculate the speed of car A.
Give your answer in kilometres per hour.
km/h
(b) Both cars start the race from the same position, S, at the same time.
(i) Find the time taken when both car A and car B are next at position S at the same time.
Give your answer in minutes and seconds.

(ii) Find the distance that car A has travelled at this time.

air exerts forces on falling objects near earth’s surface.

explanation:

the term 'free falls' refer to object that are falling towards the earth, in a situation in which gravity is the only force acting on the object.

for an object in free fall, the acceleration is constant (g, the gravitational acceleration), and so the velocity of the object constantly increases.

for objects near earth's surface, there is always another force acting on the object: the resistance due to the air. this force is opposed to the direction of fall of the object, and it is proportional to the velocity of the object, so as the object falls down, this force increases up to a point when it balances the force of gravity, and the object continues its motion at constant velocity (called terminal velocity). since in this case gravity is not the only force acting on the object, we are not in a situation of free fall.

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