Chapter 2, Problem 4P

(a)

To determine

To convert: The value of given speed in km/h.

Answer to Problem 4P

56.3255 km/h.

Explanation of Solution

Given:

Speed is v = 35 mi/h.

Formula used:

Mile and km is related as, 1 mi = 1.6093 km.

Hour and second is related as 1 hour = 3600 s.

Calculation:

Convert the given speed in km/h.

  $\begin{array}{c}35\text{ mi/h}=(35\times 1.6093)\text{km/h}\\ =56.3255\text{km/h}\end{array}$

Conclusion:

Therefore, the conversion result is 56.3255 km/h.

(b)

To determine

To convert: The value of given speed in m/s.

Answer to Problem 4P

15.6464 m/s

Explanation of Solution

Given:

Speed is v = 35 mi/h.

Formula used:

Mile and meter is related as, 1 mi = 1609.344 m.

Hour and second is related as 1 hour = 3600 s.

Calculation:

Convert the given speed in m/s.

  $\begin{array}{c}35\text{km/h}=\frac{35\times 1609.344}{3600}\text{m}/\text{s}\\ =15.6464\text{m}/\text{s}\end{array}$

Conclusion:

Therefore, the conversion result is 15.6464 m/s

(c)

To determine

To convert: The value of given speed in ft/s.

Answer to Problem 4P

51.3334 ft/s.

Explanation of Solution

Given:

Speed is v = 35 mi/h.

Formula used:

Mile and feet are related as, 1 mi = 5280 feet.

Hour and second is related as 1 hour = 3600 s.

Calculation:

Convert the given value in ft/s.

  $\begin{array}{c}35\text{mi}/\text{h}=\frac{35\times 5280}{3600}\text{ft}/\text{s}\\ =51.3334\text{ft}/\text{s}\end{array}$

Conclusion:

Therefore, the conversion result is 51.3334 ft/s.