All categories

3 years ago

A train is moving at 35 m/s to the east. it speeds up to 42 m/s east over the course of 40 seconds. what was trains acceleration

2 answers:

5 0

Acceleration = (change in speed) / (time for the change)

Change in speed = (42 - 35) = 7 m/s

Time for the change = 40 sec

Acceleration = (7 m/s) / (40sec) = 7/40 = <em>0.175 m/s²

</em>

svetoff [14.1K]3 years ago

4 0

Adding onto AL2006's answer: it is to the east. His math was correct, just don't choose the option that says west lol

You might be interested in

Carlota does 2000 J of work on a machine. The machine does 500 J of work. What is the efficiency of the

BARSIC [14]

Answer:

25%

Explanation:

500 J out of 2000 J is 25%

6 0

3 years ago

Read 2 more answers

What are ferrous and non ferrous metals<br>

pogonyaev

Answer:

Ferrous metals are ones that contain iron ( can be alloys of iron), and non-ferrous metals don't contain iron.

Hope this helps, let me know if you have any questions! :)

8 0

2 years ago

Read 2 more answers

Like electric charges repel each other. T F

pantera1 [17]

The answer is true

Hope this helps

7 0

3 years ago

Read 2 more answers

At 0°C, frozen water (ice) changes to liquid water. When an ice cube is placed on something that is warmer than it heat will mov

kondaur [170]

Answer:

a common temperature is reached.

Explanation:

The principle of heat transfer is that heat flows from a substance of higher temperature to that of lower temperature until when a common temperature is reached.

For ice on getting in contact with a hot body; it changes to water at 0°c utilising the latent heat of fusion. After ice has been converted to water at 0°c, water starts increasing in temperature till a common temperature is reached.

8 0

3 years ago

Ohm’s Law is represented by the equation I=V/R. Explain how the current would change if the amount of resistance decreased and t

vesna_86 [32]

Answer:

The current will increase with reduction in the resistance.

Explanation:

Electrical resistance reduces the flow of electricity through a conductor just like friction reduces our speed. The higher the resistance the harder it will be for the current to flow and vice versa, hence, higher resistance produces a smaller current if the voltage is held constant. The voltage is the electrical drive.

3 0

3 years ago

Read 2 more answers