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3 years ago

A person runs 15 kilometers in two hours what is his/her average speed

Physics

1 answer:

bazaltina [42]3 years ago

5 0

Answer:

$\displaystyle V=7.5\ km/h$

Explanation:

<u>Average Speed </u>

If an object travels a distance d in a time t regardless of the direction, the average speed is the quotient of the distance over the time:

$\displaystyle V=\frac{d}{t}$

It's known a person runs d=15 kilometers in t=2 hours, thus his/her average speed is:

$\displaystyle V=\frac{15\ km}{2\ h}$

Calculating:

$\boxed{\displaystyle V=7.5\ km/h}$

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3 years ago

At the focal point of a converging lens, the object:

rewona [7]

Answer:

D) Image cannot be seen

Explanation:

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4 years ago

Read 2 more answers

Describe the motion of the object in Graph B of figure 11-2.

kupik [55]

Answer : The motion of the object is, non-uniform

Explanation :

Uniform motion : It is defined as the movement of an object along a straight line with constant speed. It travels equal distances in equal time interval.

The average speed of an object is similar to the actual speed of an object. The distance-time graph shows a straight line.

Non-uniform motion : It is defined as the movement of an object along a straight line with variable speed. It travels unequal distances in equal time interval.

The average speed of an object is different to the actual speed of an object. The distance-time graph shows a curved line.

The given graph B is a non-uniform motion graph.

Hence, the motion of the object is, non-uniform