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ddd [48]
3 years ago
8

A car accelerates from rest at a constant rate of 8m/s^2. How fast is it going after 10s? How far has it gone after 10s? What is

its average velocity for the interval t = 0 to t = 10s?
Physics
1 answer:
natka813 [3]3 years ago
7 0

Answer:

velocity after 10s(v)=80m/s  ,distance traveled after 10s(S)=400m,  average velocity for time interval 0-10s =40m/s

Explanation:

using the equation of motion,

v=u+at

u=0 (the body starts from rest)

a=8m/s²

t=10s

v= 0+8*10

v=80m/s

distance traveled after 10s,

v²=u²+2as

80²=0²+(2*8*S)

6400 =16S

S= 6400/16

S=400m

average velocity = \frac{v+u}{2}

u= 0, v =80m/s

average velocity = (80+0)/2

                          =40m/s

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3 years ago
Which word describes the maximum a point moves from its rest position when a wave passes?
Tom [10]

Answer:

Amplitude.

Explanation:

A wave can be defined as a disturbance in a medium that progressively transports energy from a source location to another location without the transportation of matter.

In Science, there are two (2) types of wave and these include;

I. Electromagnetic waves: it doesn't require a medium for its propagation and as such can travel through an empty space or vacuum. An example of an electromagnetic wave is light.

II. Mechanical waves: it requires a medium for its propagation and as such can't travel through an empty space or vacuum. An example of a mechanical wave is sound.

An amplitude can be defined as a waveform that's measured from the center line (its origin or equilibrium position) to the bottom of a trough or top of a crest.

Hence, an amplitude is a word that describes the maximum displacement a point moves from its rest position when a wave passes.

On a graph, the vertical axis (y-axis) is the amplitude of a waveform and this simply means that, it's measured vertically.

Mathematically, the amplitude of a wave is given by the formula;

x = Asin(ωt + ϕ)

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6 0
3 years ago
A 180 g model airplane charged to 18 mC and traveling at 2.2 m/s passes within 8.6 cm of a wire, nearly parallel to its path, ca
viva [34]

Answer:

a=0.2*10^{-5}g

Explanation:

From the question we are told that:

Mass M=180=>0.18kg

Charge Q=18mC=18*10^-^3C

Velocity v=2.2m/s

Length of Wire L=8.6cm=>0.086

Current I=30A

Generally the equation for Magnetic Field of Wire B is mathematically given by

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Generally the equation for Force on the plane F is mathematically given by

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Therefore

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Therefore in Terms of g's

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8 0
2 years ago
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