Question

a body is projected upward with a velocity of 19.6m/s.find the velocity after 3 secs

Answer 1

Explanation:

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Answer 2

Answer:

A body is projected upward with a velocity of 19.6m/s, the velocity after 3 secs will be $-9.8m/s$

Explanation:

• We can solve this problem using the first equation of motion.

        It is given by,

        $V = u+at$    ...(1)

       Where $V$is the final velocity of the body, $u$ is the initial velocity, $a$ is the acceleration due to gravity, and $t$is the time taken by the body.

• From the question,

       The initial speed of the body = $19.6m/s$

       The time is taken = $3s$

        since the body is thrown upwards.

        $a = -g$

        We know g is the acceleration due to gravity

        $g= 9.8m/s^2$

• Substitute these values into equation (1)

        $V = 19.6-(9.8\times 3)$

            $=-9.8 \ m/s$