Question Video: Comparing the Speeds of Two Objects | Nagwa Question Video: Comparing the Speeds of Two Objects | Nagwa

# Question Video: Comparing the Speeds of Two Objects Science • Third Year of Preparatory School

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The grid shown consists of equally spaced lines. A blue object and an orange object are both moving across the grid with uniform speeds. The objects move for the same duration. How do the speeds of the objects as they travel compare?

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### Video Transcript

The grid shown consists of equally spaced lines. A blue object and an orange object are both moving across the grid with uniform speeds. The objects move for the same duration. How do the speeds of the objects as they travel compare? (A) The blue object has greater speed. (B) The orange object has greater speed. Or (C) the speeds of the objects are the same.

Let’s start by recalling that the speed of an object measures the distance the object moves in some amount of time. Here, we were told that both objects move for the same duration, so they move for the same amount of time. We can compare their speeds, then, by comparing the distance that each object travels. For instance, if one object moves farther than the other in the same amount of time, then we know that it must have a greater speed.

Let’s use the marks on the grid to measure how far each object moves. For the orange object, we can see that it moves one, two, three, four, five units. And for the blue object, it moves one, two, three, four, five units, the same as the orange object. This means that both objects move the same distance over the same amount of time, so we can conclude that their speeds are the same.

Option (C) is the correct answer. We’ve found that the speeds of the objects are the same.

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