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Varvara68 [4.7K]
3 years ago
8

A car, X, with a mass of 1500 kg is moving west with an acceleration of 0.50 m/s2. A second car, Y, of equal mass is heading eas

t with an acceleration of 1.0 m/s2. Which of the following statements best describes the net force acting on each car?
Physics
1 answer:
ehidna [41]3 years ago
8 0

Answer:

A

Explanation:

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In order to find the resultant of two vectors we must use the pythagoran therom, a +b2-2. Where the crepresents the resultant ve
nadezda [96]

Answer:

Furthermore, the Pythagorean theorem works when the two added vectors are at right angles to one another - such as for adding a north vector and an east vector.

8 0
3 years ago
Each ball has a negligible size and a mass of 11.5 kg and is attached to the end of a rod whose mass may be neglected. The rod i
Digiron [165]

Answer:

3.31m/s

Explanation:

Angular momentum for 3s is

L = L_i_n_i + L_3_s

L = 2(11.5kg) + \int\limits^ {3s}_ {0s} {(t^2 + 2)} \, dt

L = 23kg+(\frac{t^3}{3} +2t)^ {3s}_ {0s}\\\\L=38kgm/s

Moment if inertia is

I = 2ml^2

I = 2(11.5)(0.5)^2\\\\I=5.75kgm^2

Angular speed

ω = L/I

= 38 / 5.75\\\\=6.61

The speed of each ball is

V = ωL

= 6.61\times0.5\\\\= 3.31m/s

7 0
3 years ago
A car goes from 40n/s to 60 m/s in 8s the acceleration of the car is
stich3 [128]
Acceleration= change in velocity/ change in time.

60-40=20 m/s (change in speed)
Time= 8 seconds

20/8= 2.5
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Hope this helps! :)
7 0
3 years ago
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Which of the following is an example of biological weathering
7nadin3 [17]

An example of biological weathering is the widening of gaps in rocks caused by tree roots since pressure or stress is exerted on the rocks due to the growing plant roots. The pressure is exerted by a biological process (i.e., growing roots), even though the process is physical.

 

Plants and animals and its action speeds up mechanical and or chemical weathering, which in turn causes biological weathering.

 

<span>With the help of the chemicals that are produced by the tiniest bacteria, algae and liches, the rocks which they live in are also broken down by them in order to get the nutrients they need.</span>

3 0
4 years ago
A convex (converging) lens produces a real, inverted image of an object that is magnified 2.20 times when the object is 43.0 cm
N76 [4]

Answer:29.56 cm

Explanation:

Given

magnification is 2.2

Object distance(u)=43 cm

and we know

m=-\frac{v}{u}

2.2=-\frac{v}{-43}

v=43\times 2.2=94.6 cm

And focal length of convex lens is given by

\frac{1}{f}=\frac{1}{v}+\frac{1}{u}

\frac{1}{f}=\frac{1}{94.6}+\frac{1}{43}

f=29.56 cm

3 0
3 years ago
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