temperature decreases at higher altitudes because as air rises the pressure decreases.
Answer:
A) F=650N
B) W=0J
C)
Explanation:
A) Considering the equation , we can calculate:
B) The work the wall does is 0J, because the fingers of the scater against it do not move. It's the muscles on his arm that do the work.
C)
<h3>
Answer:</h3>
60 m
<h3>
Explanation:</h3>
<u>Concept Used:</u>
We know that the area under a velocity-time graph represents the Displacement of the body
<u>Displacement in the Last 6 seconds:</u>
To find the Displacement in the last 6 seconds, we will find the area under the graph between x = 4 and x = 10
We can see that the shape formed is a rectangle also shown in the given graph. So, the area of the rectangle is the Displacement of the car in the last 6 seconds
<u>Area of the Rectangle:</u>
From the graph, we know that the rectangle is 10 (m/s) tall and 6 (s) wide
Area of Rectangle= length*Breadth
replacing the values
Area = 10 (m/s) * 6 (s)
Area = 60 m
Hence, the car travelled 60 m in the last 6 seconds of the graph
A set of two forces that are in opposite directions, have equal magnitudes and act on different objects