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ser-zykov [4K]
3 years ago
6

A small toy car travels 2.0 meters in 120 seconds. what is the speed of the car?

Physics
1 answer:
mamaluj [8]3 years ago
4 0

Answer:\dfrac{1}{60} ms^{-1}

Explanation:

Speed of an object is defined as the ratio of the distance covered by the object to the time taken to cover that distance.

Let s be the speed of the object.

Let D be the distance travelled by the object.

Let t be the time taken by the object.

So,s=\frac{D}{t}

s=\frac{2}{120}=\frac{1}{60}ms^{-1}

So,the speed of the car is \frac{1}{60}ms^{-1}

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A rod of length L and mass M has a nonuniform mass distribution. The linear mass density (mass per length) is λ=cx2, where x is
grigory [225]

Answer:

Explanation:

λ=c x²

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so its dimensional formula is ML⁻¹

x is length so its dimensional formula is L

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B )

We shall find out the mass of the rod with the help of given expression of mass per unit length and equate it with given mass that is M

The mass in the rod is symmetrically distributed on both side of middle point.

we consider a small strip of rod of length dx at x distance away from middle point

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By integrating it from -L to +L we can calculate mass of whole rod , that is

M = ∫cx² dx

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= c/3 [ L³/8 + L³/8]

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C ) Moment of inertia of rod

∫dmx²

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= ∫cx⁴dx

= c x⁵ / 5 from - L/2 to L/2

= c / 5 ( L⁵/ 32 +L⁵/ 32)

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=

=

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Answer:

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Two waves meet in such a way their highs(Crests) combine to form a new waves whose magnitude is the sum of magnitude of combining waves.

Since two waves have same wavelength and are in phase so when they combine they well form a way which has the magnitude equal to the sum of the magnitude of both waves.

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nirvana33 [79]

Answer:

4

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Correct choice is #4.

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