What is the velocity of the object between t = 0 and t = 8s?________. Write the

Question

What is the velocity of the object between t = 0 and t = 8s?________. Write the equation for s in terms of t for that same interval. What is the velocity of the object between t = 8 sec and t = 25 sec?__________Describe a physical representation of this graph. Is the object in uniform or accelerated motion?__________, How can you tell? What is the acceleration?_________. What is the initial velocity? Write the equation for v in terms of t During what time interval is the object in uniform motion?___________. What is the velocity for the above question?____________During what time interval is the object accelerating?__________What is the acceleration?__________. What is the object doing between t = 0 and t = 7 sec?_____________. What is the acceleration for the same interval?_____________. What is the object doing between t = 7 sec and t = 18 sec?___________. What is the acceleration?__________. What is the object doing between t = 18 sec and t = 26 sec?___________What is the acceleration?___________Describe a scenario where the above motion could occur.

Explanation / Answer

Q6.

Velocity = displacement/time = (sf - si)/(tf - ti)

A.

tf = 8 sec

ti = 0 sec

sf = 25 m

si = 0 m

V = (25 - 0)/(8 - 0) = 3.125 m/sec

B.

tf = 25 sec

ti = 8 sec

sf = 25 m

si = 25 m

V = (25 - 25)/(25 - 8) = 0 m/sec

Physical meaning: from time t = 0 to t = 8 sec the car's speed was accelerating and after that car has stopped for the rest of time.

7.

initial velocity = 17.5 m/sec

accelertion = dV/dt = (Vf - Vi)/(tf - ti)

accelration = (45 - 17.5)/(25 - 0) = 1.1 m/sec^2

object is in accelrated motion

By calculating acceleration for different time period

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