Question

what is the total displacement of the car after five h?

0km
15km
20km
40km

Answer 1

It's right there on the graph ! At 5 hours, the displacement is zero.

"How can that be ?", you ask.
That's a great question.
The car started out, drove farther and farther from home for the first 4 hours, then drove back home during the 5th hour. It's all right there on the graph.

Answer 2

The total displacement of the car after five hours - 0km.

Displacement -

• Displacement is a vector quantity that refers to the object's overall change in position.
• change in final position from its initial position
• calculating the distance between an object's initial position and its final position.
• In physics terms, displacement is referred to as the variable s. The official displacement formula is as follows:

                 s = sf – si.

where, s = displacement.

In the given graph there is a change in distance covered with the time that are:

• after two hours it reaches 15 km away from the initial point

• after 4 hours car reaches 20 km away from the initial point
• After 5 hours it returns back to the initial point.

Thus, the displacement would be 0 km as the final point and initial point are the same.

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