Question

A ball is thrown up ward with a speed of 10m/s. Calculate the speed of the ball after 1s.​

Answer 1

V=U-gt

Substituting values

V=10-10x1

=10-10=0m/s

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Answer 2

Answer:

A ball is thrown upward with a speed of 10m/s. The speed of the ball after 1s will be $0.2 m/s$

Step-by-step explanation:

• From the question,

       The initial speed of the body = $10m/s$

       The time is taken = $1 s$

• 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.

• 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)

$V = 10-(9.8\times 1)$

    $=0.2 m/s$