The position-time graph describes the motion of a moving object. Describe the motion represented by each segment of the graph. not
moving
constant
speed
speeding
up
slowing
down
y
annel
80
E
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с
D
Position (m)
В.
40
20
А
+
0
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Time (s)

Aperson walking 1 mile everyday for exercise, leaving her front porch at 9: 00 am and returning to her front porch at 9: 25 am. what is the total displacement of her daily walk? a) 1 mileb) 0c) 25 minutes d) none of the above

Astone is dropped from the upper observation deck of a tower, 250 m above the ground. (assume g = 9.8 m/s2.) (a) find the distance (in meters) of the stone above ground level at time t. h(t) = (b) how long does it take the stone to reach the ground? (round your answer to two decimal places.) s (c) with what velocity does it strike the ground? (round your answer to one decimal place.) m/s (d) if the stone is thrown downward with a speed of 2 m/s, how long does it take to reach the ground? (round your answer to two decimal places.) s

Explain how waste energy is produced when an inefficient lightbulb converts electrical energy into radiant energy.