Sally is going on a vacation with her family. in 2 hours they travel 90.5 miles. if they travel at the same speed, write an equation that represents how far they will travel, d, in h hours

Step-by-step explanation:

This constant motion is represented by:

Where is distance, is speed and is time.

We know that in 2 hours they travel 90.5 miles, this gives us a speed of:

But, the problem is asking for a general expression:

Therefore, they travel a distance in hours, according to the expression

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.

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