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Diano4ka-milaya [45]
3 years ago
15

What are forces that two objects apply on each other

Physics
1 answer:
liq [111]3 years ago
3 0
Answer: Whenever two objects are touching, they usually exert forces on each other. The force of gravity, on the other hand, is an example of a force that exists between objects without them having to be in contact. Objects with mass exert forces on each other via the force of gravity.

HOPE IT HELPED:) HAVE A NICE DAY
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The speed of a moving bullet can be deter-
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Answer:

<em>v = 381 m/s</em>

Explanation:

<u>Linear Speed</u>

The linear speed of the bullet is calculated by the formula:

\displaystyle v=\frac{x}{t}

Where:

x = Distance traveled

t = Time needed to travel x

We are given the distance the bullet travels x=61 cm = 0.61 m. We need to determine the time the bullet took to make the holes between the two disks.

The formula for the angular speed of a rotating object is:

\displaystyle \omega=\frac{\theta}{t}

Where θ is the angular displacement and t is the time. Solving for t:

\displaystyle t=\frac{\theta}{\omega}

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\theta=14*\pi/180=0.2443\ rad

The angular speed is w=1436 rev/min. Converting to rad/s:

\omega = 1436*2\pi/60=150.3776\ rad/s

Thus the time is:

\displaystyle t=\frac{0.2443\ rad}{150.3776\ rad/s}

t = 0.0016 s

Thus the speed of the bullet is:

\displaystyle v=\frac{0.61}{0.0016}

v = 381 m/s

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Which of the following is an example of a physical change?
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Answer:

Explanation:

Given that,

At one instant,

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M1=? X1 =0

The other has a mass M2=0.1kg

And it is at rest at position X2= 8m

a. Center of mass is given as

Xcm = (M1•X1 + M2•X2) / (M1+M2)

2 = (M1×0 + 0.1×8) /(M1 + 0.1)

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Cross multiply

2(M1+0.1) = 0.8

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b. Total momentum, this is an inelastic collision and it momentum after collision is given as

P= (M1+M2)V

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c. Velocity of particle at origin

Using conversation of momentum

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So, P(before) = 0.3V1

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Then,

P(before) = P(after)

0.3V1 = 2 •i

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V1 = 6 ⅔ •i m/s

V1 = 6.667 •i m/s

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3 years ago
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