How much time will alex need to walk to his school, which is 2
1
4
miles away from his house, if he would walk with the speed of …
chapter reference

3 3/4 mph

In this exercise, we know the following facts:

From physics, we know that distance (d), time (t) and speed (v) are related as the following equation:

Isolating t:

Alex would need a little more than half an hour to get the school from his house.

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constant acceleration- a

constant velocity- c

no velocity or acceleration- b

explanation:

for body moving with a constant acceleration, the rate of change of displacement changes over time. this is proven by the increasing gradient of the curve (a) against time.

a body that is moving at constant velocity covers equal distances over equal periods of time, thus the straight line with a constant gradient c.

a stationary body   covers no displacement as time elapses. thus the flat line with   zero gradient.