If a train travels at a speed of 40 km/h for 3 hours, how far will it travel
2 answers:
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Answer:
90 meters
Explanation:
To find the distance in which Bob catches up with Wendy, you first write down the motion equations of both Bob and Wendy.
Wendy has a constant speed, then you have:
(1)
Bob has an accelerated motion, then, his equation of motion is:
(2)
v1: constant speed of Wendy = 3.00 m/s
v2: initial speed of Bob = 0 m/s
a: acceleration of Bob = 0.200m/s^2
When Bob catches up with Wendy x1 = x2, then you equal both equations and solve for time t:
you replace the values of a and v1:
Finally, you replace this value of time either the equation for x1 or the equation for x2, and you calculate the distance:
hence, Bob catches up with Wendy for a distance of 90m