Chapter 4.1, Problem 17PPE

(a)

To determine

To sketch: a graph of given situation, whether the graphs are same.

Explanation of Solution

Given information:

When speed as travel on a ski lift from the bottom of ski slope to the top.

Calculation:

Consider the situation in which are travelling on ski lift from bottom of ski slope to top. Speed will be constant when ski is moving from bottom to top right from the beginning till it stops.

The graph which shows this relationship is as follows-

In this graph $x$ axis represents time and $y$ axis represents speed.

  

(b)

To determine

To sketch: a graph of given situation, whether the graphs are same.

Explanation of Solution

Given information:

When speed as ski from the top of ski slope to the bottom.

Calculation:

Consider the situation in which are travelling from top of ski slope to the bottom then speed will steadily increase and ultimately it will start dropping till it comes to zero.

The graph which shows this relationship is as follows-

In this graph $x$ axis represents time and $y$ axis represents speed

  

Observe both graphs. Can see that, they are not same because in the first graph speed is constant at each moment and in the second graph speed varies.