A cricket ball of mass 0.15 , kg is thrown vertically up by a bow… - Vidyadip

MCQ

A cricket ball of mass $0.15\, kg$ is thrown vertically up by a bowling machine so that it rises to a maximum height of $20 \;m$ after leaving the machine. If the part pushing the ball applies a constant force $F$ on the ball and moves horizontally a distance of $0.2\, m$ while launching the ball, the value of $F($ in $N)$ is

$\left(g=10\, m s^{-2}\right)$

A
$200$
✓
$150$
C
$275$
D
$325$

✓

Answer

Correct option: B.

$150$

b
$W _{ F }=\frac{1}{2} mv ^{2}= mgh$

$F ( S )= mgh$

$F (0.2)=(0.15)(10)(20)$

$F =150 N$

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