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Ilya [14]
3 years ago
8

Two soccer players kick the same 1-kg ball at the same time in opposite directions. one kicks with a force of 20 n; the other ki

cks with a force of 12 n. what is the resulting acceleration of the ball, in m/s2.
Physics
2 answers:
REY [17]3 years ago
7 0

Answer:

8 m/s but just write 8

Explanation:

kolezko [41]3 years ago
6 0
We can solve the problem by using Newton's second law of motion:
\sum F = ma (1)
where
the term on the left is the resultant of the forces acting on an object
m is the mass of the object
a is the acceleration of the object

The mass of the ball in this problem is m=1 kg. Two forces are applied, in opposite directions, of 20 N and 12 N, therefore the resultant of the forces is
\sum F= 20 N-12 N=8 N

Therefore, we can rearrange eq.(1) and use these data to find the acceleration of the ball:
a= \frac{\sum F}{m}= \frac{8 N}{1 kg}=8 m/s^2
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12. The answer would be C. 1.50 s. This is because if you divide 60 by 40, you will get 1.5.

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A 3kg horizontal disk of radius 0.2m rotates about its center with an angular velocity of 50rad/s. The edge of the horizontal di
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Answer:

D

Explanation:

From the information given:

The angular speed for the block \omega = 50 \ rad/s

Disk radius (r) = 0.2 m

The block Initial velocity is:

v = r \omega \\ \\  v = (0.2  \times 50) \\ \\  v= 10 \ m/s

Change in the block's angular speed is:

\Delta _{\omega} = \omega - 0 \\ \\ = 50 \ rad/s

However, on the disk, moment of inertIa is:

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The time t = 10s

∴

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