A train travels 120 km in 2 hours and 30 minutes. What is its average speed?
2 answers:
Answer:
<em>The average speed of the train is 48 km/hr</em>
Explanation:
The term average speed refers to how fast a body is covering a distance. it is the rate at which a body covers a distance with time. Cars, Humans, and animals are among bodies that can attain speed. speed is measure in m/s.
<h3>Step by Step Calculation</h3>speed of an object can be obtained using the equation below;
Speed = ....................................1
from the question we are provided with;
Distance = 120 km
Time = 2 hours 30 minutes
Speed =?
The time can not operate with two units, so we have to convert 30 minutes to hours;
60 mins = 1 hr
30 mins = x hrs
x =
x = 0.5 hours
now our time will be 2 hrs + 0.5 hr = 2.5 hrs
Substituting our values in equation 1 we have;
Speed =
Speed = 48 km/hr
<em>Therefore, the average speed of the train is 48 km/hr</em>
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F=ma
The force is the product of mass and acceleration
this means that the acceleration is
a=F/m
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this means that f will be
a=
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b) The object's mass is halved?
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a=
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