The vertices of a rectangle are labeled A, B, C and D, going clockwise. The perimeter of the rectangle ABCD is 100 and AB = 20. Find the length of the diagonal AC.

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.

a negative exponent is translated as follows:

so, we have