32. Running Speed A man is running around a circular track that is 200 m in circumference. An observer uses a stopwatch to record the runner's time at the end of each lap, obtaining the data in the following table. (a) What was the man's average speed (rate) between 68 s and 152 s? (b) What was the man's average speed between 263 s and 412 s? (c) Calculate the man's speed for each lap. Is he slowing down, speeding up, or neither? Time (s) Distance (m) 32 200 68 400 108 600 152 800 203 1000 263 1200 335 1400 412 1600
Unitary Method
The word “unitary” comes from the word “unit”, which means a single and complete entity. In this method, we find the value of a unit product from the given number of products, and then we solve for the other number of products.
Speed, Time, and Distance
Imagine you and 3 of your friends are planning to go to the playground at 6 in the evening. Your house is one mile away from the playground and one of your friends named Jim must start at 5 pm to reach the playground by walk. The other two friends are 3 miles away.
Profit and Loss
The amount earned or lost on the sale of one or more items is referred to as the profit or loss on that item.
Units and Measurements
Measurements and comparisons are the foundation of science and engineering. We, therefore, need rules that tell us how things are measured and compared. For these measurements and comparisons, we perform certain experiments, and we will need the experiments to set up the devices.
Running Speed A man is running around a circular track
that is 200 m in circumference. An observer uses a stopwatch
to record the runner’s time at the end of each lap, obtaining
the data in the following table.
(a) What was the man’s average speed (rate) between 68 s
and 152 s?
(b) What was the man’s average speed between 263 s and 412 s?
(c) Calculate the man’s speed for each lap. Is he slowing
down, speeding up, or neither?
Trending now
This is a popular solution!
Step by step
Solved in 3 steps
