Glencoe Physical Science 2012 Student Edition (Glencoe Science) (McGraw-Hill Education)
Glencoe Physical Science 2012 Student Edition (Glencoe Science) (McGraw-Hill Education)
1st Edition
ISBN: 9780078945830
Author: Charles William McLaughlin, Marilyn Thompson, Dinah Zike
Publisher: Glencoe Mcgraw-Hill
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Chapter 2, Problem 9STP
To determine

To Choose:The correct option.

Expert Solution & Answer
Check Mark

Answer to Problem 9STP

A correct answer is an option (B).

Explanation of Solution

Given:

The given table is shown below

    RunnerDistance covered (km)Time (min)
    Ling-Long12.542
    LaToya7.838
    Bill10.532
    Jose8.930

Formula used:

The average speed is

  s=dt  ...... (1)

Here, d and t are distance and time taken to travel.

Momentum can be written as

  p=mv  ...... (2)

Here, m and v are mass and speed.

Calculation:

Substitute 12.5 km for d and 42 min for t in equation (1) for Ling-Ling’s average speed

  s=12.5km42mins=0.30km/min

Substitute 7.80 km for d and 38 min for t in equation (1) for LaToya’s average speed

  s=7.8km38mins=0.20km/min

Substitute 10.5 km for d and 32 min for t in equation (1) for Bill’s average speed

  s=10.5km32mins=0.33km/min

Substitute 8.9 km for d and 30 min for t in equation (1) for Jose’s average speed

  s=8.9km30mins=0.30km/min

From equation (1), it can be observed that speed is directly proportional to the momentum, therefore, lesser speed smaller would be the momentum. From the above calculation, it is evident that LaToya has smallest momentum.

Conclusion:

Hence,LaToya has smallest momentum.

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