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26 January, 22:07

4. Calculate the instantaneous speed (in m/s) at

the 10-second mark for a car that accelerates

at 2 m/s from a position of rest.

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Answers (1)
  1. 26 January, 22:22
    0
    The instantaneous speed is 20 m/s

    Explanation:

    The instantaneous speed is the speed of an object at a particular

    moment in time

    To calculate instantaneous speed, we need to divide part of the total

    distance traveled by time

    We need to find the instantaneous speed at 10 seconds for a car that

    accelerates at 2 m/s² from a position of rest

    That means the car accelerate from rest

    The initial speed u is zero

    We can find the instantaneous speed at 10 seconds by using the rule

    → v = u + at

    → u = 0, a = 2 m/s², t = 10 seconds

    Substitute these value in the rule

    → v = 0 + 2 * 10 = 20 m/s

    The instantaneous speed is 20 m/s
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