# Physics

**Question 1, chap 102, sect 2.**

*part 1 of 1 10 points*

The graph below shows the velocity v as a

function of time t for an object moving in a

straight line.

t

v

0 tQ tR tS tP

Which of the following graphs shows the

corresponding displacement x as a function of

time t for the same time interval?

**Question 2, chap 102, sect 3**.

*part 1 of 2 10 points*

A particle moves according to the equation

x = (10 m/s2) t2 where x is in meters and t is

in seconds.

Find the average velocity for the time in-

terval from t1 = 2.18 s to t2 = 4.44 s.

Answer in units of m/s.

**Question 3, chap 102, sect 3.**

*part 2 of 2 10 points*

Find the average velocity for the time in-

terval from t1 = 2.18 s to t3 = 2.28 s.

Answer in units of m/s.

**Question 4, chap 102, sect 1**.

*part 1 of 2 10 points*

A physics book is moved once around the

perimeter of a table of dimensions 1 m by 3

m.

If the book ends up at its initial position,

what is the magnitude of its displacement?

**Question 5, chap 102, sect 1.**

*part 2 of 2 10 points*

What is the distance traveled?

**Question 6, chap 102, sect 5.**

*part 1 of 4 10 points*

Consider a moving object whose po-

sition x is plotted as a function of

the time t on the following figure:

**Question 11, chap 102, sect 6.**

*part 1 of 2 10 points*

A speedboat increases in speed from

16.9 m/s to 30.7 m/s in a distance 170 m.

Find the magnitude of its acceleration.

Answer in units of m/s2.

**Question 12, chap 102, sect 6.**

*part 2 of 2 10 points*

Find the time it takes the boat to travel

this distance.

Answer in units of s.

**Question 13, chap 102, sect 7.**

*part 1 of 1 10 points*

A ball thrown straight up at ground level

passes a height of −0.6 m in 5.8 s.

The acceleration of gravity is 9.8 m/s2 .

What was its initial speed?

Answer in units of m/s.