A boat is moving at the rate of 15.0 meters per second. It’s speed is then decreased uniformly to 3.0 meters per second. It takes 4 seconds

Question

A boat is moving at the rate of 15.0 meters per second. It’s speed is then decreased uniformly to 3.0 meters per second. It takes 4 seconds for the speed to decrease. What is the magnitude of the deceleration of the car ?

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Trúc Chi 3 years 2021-08-23T14:58:57+00:00 1 Answers 6 views 0

Answers ( )

  1. Dulcie
    0
    2021-08-23T14:59:58+00:00
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    Explanation:

    Given:

    Initial velocity: 15 m/s

    Final velocity: 3 m/s

    Time: 4 s

    Equation to be used is:

    v = u + a*t

    3 = 15 + a*(4)

    a = -3 m/s^2

    Since a is negative, the car is decelerating.

    __________________________________________________________

    General note for kinematic equation questions:

    These equations are built around 5 quantities:

    s = displacement

    u = initial velocity

    v = final velocity

    t = time

    a = acceleration

    Before starting, list down what quantities are given in the question and what quantities are asked. This will help you choose the right kinematic equation to solve the problem.

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