A train travels 98 kilometers in 1 hours, and then 78 kilometers in 3 hours. what is its average speed?this is a fill in the blank question. thanks!

Answers

Answer 1

Answer:

The average speed over the total four hour interval is

$\frac{98\,\mathrm{km}+78\,\mathrm{km}}{4\,\mathrm h}=31\,\frac{\mathrm{km}}{\mathrm h}$

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Answers

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What causes a nebula to collapse into a dense mass?

Answers

the answer is Gravity.

Irregularities in the density of the gas causes a net gravitational force

In which direction does a bag at rest move when a force of 20 newtons is applied from the right? A. in the direction of the applied force B. in the direction opposite of the direction of the applied force C. perpendicular to the direction of the applied force D. in a circular motion

Answers

The correct answer is A. In the direction of applied force. This is because acceleration occurs n the direction of applied force according to Newtons second law of motion which states that the acceleration of a body is directly proportional to the applied force and takes place in the direction of force.

Answer:

A. in the direction of the applied force

Explanation:

As per newton's first law of motion we know that object will not change in its state of motion till some external force is applied on it

So here we can say that when force is applied on an stationary object then the stationary object will move in the direction of applied force so change in the state of motion from rest state to moving state will occur and the direction of motion must be in applied force direction

So correct answer will be

A. in the direction of the applied force

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