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3 years ago

10

WILL GIVE BRAINLIEST PLEASE I NEED THIS! A 100-kg projectile crashes through a castle wall with a kinetic energy of 266.45 kJ. W

hat was the speed of the projectile?

1 answer:

denpristay [2]3 years ago

7 0

K.E.=
$\frac{1}{2} m {v}^{2}$
so just sub in the info you are provided with.
266.45x10^3=0.5×100xv^2
V is 73.

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PLS ANSWER ASAP!!

Molodets [167]

b) between poles M1 and M2

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Mathematically:

FM = K $\frac{M1 M2}{r^{2} }$

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3 years ago

Ted William drops a ball from 14.5 meter to a desk that is 1.9 meters tall. What is the final speed of the ball right before it

makkiz [27]

Answer:

15.7m/s

Explanation:

To solve this problem, we use the right motion equation.

Here, we have been given the height through which the ball drops;

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The right motion equation is;

V² = U² + 2gh

V is the final velocity

U is the initial velocity = 0

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h is the height

Now insert the parameters and solve;

V² = 0² + 2 x 9.8 x 12.6

V² = 246.96

V = √246.96 = 15.7m/s

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