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Serggg [28]
3 years ago
14

Mary is 52kgs and standing on a ladder. What forces are acting on her?

Physics
1 answer:
Rus_ich [418]3 years ago
8 0

Answer:

3 forces are acting on her: Friction, Gravity and Muscular force.

Explanation:

Due to gravity and friction she is remaining on the ladder without flying and by not slipping.

Because of muscular force she is being able to interact with ladder and stand on it. Otherwise she will fell down.

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What happens to molecules when their kinetic energy decreases?
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Answer:

The speed of molecule decreases and temperature also decreases

Explanation:

Kinetic energy of the molecules of a subsance is directly proportional to the temperature of molecule So as the kinetic energy decrease, temperature also decreases. decreses their speed.

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3 years ago
Identify characteristics of energy from the Sun. Check all that apply.
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Answer:

First one, third one, and fourth one

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2 years ago
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Calculate the radius of the orbit of a proton moving at 2.2x10^6 m/s in a magnetic field 0.7 T where v and B are perpendicular.
Juliette [100K]

Answer:

3.28 cm

Explanation:

To solve this problem, you need to know that a magnetic field B perpendicular to the movement of a proton that moves at a velocity v will cause a Force F experimented by the particle that is orthogonal to both the velocity and the magnetic Field. When a particle experiments a Force orthogonal to its velocity, the path it will follow will be circular. The radius of said circle can be calculated using the expression:

r = \frac{mv}{qB}

Where m is the mass of the particle, v is its velocity, q is its charge and B is the magnitude of the magnetic field.

The mass and  charge of a proton are:

m = 1.67 * 10^-27 kg

q = 1.6 * 10^-19 C

So, we get that the radius r will be:

r =  \frac{1.67 * 10^-27 kg * 2.2*10^6 m/s}{1.6 * 10^-19 C* 0.7 T} = 0.0328 m, or 3.28  cm.

8 0
3 years ago
A car moving around a circular track with constant speed (Select all that apply.) has an acceleration with a direction that cann
BARSIC [14]

Answer:

Explanation:

Has an acceleration directed towards center of its path

5 0
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The state of matter is an example of a physical property. Why is the state of matter considered aphysical property, even though
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3 years ago
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