Question

name:
speed worksheet #2

1. suppose a polar bear was running on land instead of swimming. if the polar bear runs at a speed of 8.3

meters per sec, how far will it travel in 10.0 hours

1. like the polar bear, the walrus is a fine swimmer, though it does not have the same endurance. for short

periods of time, a walrus can swim with an average speed of 9.7 meters per second. how far would a
walrus swim at this speed in 3.4 minutes?

Explanation:

Step1: Convert time units

For problem 1:

• Convert 10.0 hours to seconds.
• \(1\) hour \( = 3600\) seconds, so \(10.0\) hours \(=10\times3600 = 36000\) seconds.

For problem 2:

• Convert 3.4 minutes to seconds.
• \(1\) minute \( = 60\) seconds, so \(3.4\) minutes \(=3.4\times60=204\) seconds.

Step2: Use the formula \(d = v\times t\)

For problem 1:

• Given \(v = 8.3\) meters per second and \(t = 36000\) seconds.
• \(d=8.3\times36000\)
• \(d = 298800\) meters.

For problem 2:

• Given \(v = 9.7\) meters per second and \(t = 204\) seconds.
• \(d=9.7\times204\)
• \(d=(10 - 0.3)\times204=10\times204-0.3\times204=2040 - 61.2 = 1978.8\) meters.

Answer:

1. \(298800\) meters
2. \(1978.8\) meters