A Cannon makes a noise, and it's echo is heard 4.5 seconds later. if sound travels at 343 m/s:
1 answer:
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Answer:
Explanation:36.05 km
Given
First car travels South
then turns and travels east
Suppose south as negative y axis and east as positive x axis
So,
Displacement is the shortest between initial and final point
Dispalcement
Displacement
Displacement
Magnitude
Magnitude
Velocity:
Velocity is change in displacement with respect to time:
Analysing the units, meters (displacement) and seconds (time) are basic units:
Therefore the unit of velocity is m/s
Force:
Newton's second law of motion:
Kilogram (mass) is a basic unit, and accelerations unit can be found using the equation:
Analysing the units:
Therefore, the unit of force is:
Pressure:
Pressure is given by the equation:
where S is area of effect, F is force
Area for a basic rectangle (geometric shape is arbitrary for dimensional analysis) is found by multiplying two lengths:
, the unit of area
Dividing the aforementioned unit of force by the unit of area:
, the unit of pressure
Work:
Work is given by the equation:
, (dot product may be assumed as normal multiplication for the purposes of unit analysis)
Knowing displacement's (x) unit is m:
, the unit of work.