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3 years ago

A racing car going a 20 m/s stops in a distance of 20 m.What is its acceleration?

Physics

1 answer:

aleksklad [387]3 years ago

3 0

step by step

formular v^2 = u^2+2as

stop v = 0

0 = 400+2a(20)

-400=40a

a = -10 m/s^2

ans affect acceleration is 10 m/s^2

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2) A car travels 5 miles north, and then 10 miles south. What is the person's DISTANCE and

Liono4ka [1.6K]

Answer:

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Explanation:

Distance takes time into account and adds up all the tiny displacements during the entire period of the trip.

Displacement ignores time and looks only at the change in position from the starting point to the ending point.

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3 years ago

If the value of static friction for a couch is 400N, what could be a possible value of its kinetic friction? *

Dafna11 [192]

Answer:

kinetic friction may be greater than 400 N or smaller than 400 N

Explanation:

As we know that maximum value of static friction on the rough surface is known as limiting friction and the formula of this limiting friction is known as

$F_s = \mu_s N$

now when object is sliding on the rough surface then the friction force on that surface is known as kinetic friction and the formula of kinetic friction is known as

$F_k = \mu_k N$

now we know that

$\mu_k < \mu_s$

so here value of limiting static friction force is always more than kinetic friction

also we know that

initially when body is at rest then static friction value will lie from 0 N to maximum limiting friction

and hence kinetic friction may be greater than static friction or if the static friction is maximum limiting friction then kinetic friction is smaller than static friction

so kinetic friction may be greater than 400 N or smaller than 400 N

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3 years ago

Explaining How Momentum Can Cause

Ghella [55]

Answer:

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Explanation:

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3 years ago

What is the mass of 5 moles of gold

Serhud [2]

First of all, we know that one mole is equal to the atomic number of an element.

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And we need to find 5 moles.

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Answer: </span>985.0g

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3 years ago

Read 2 more answers

;-; please help me....

sineoko [7]

The answer is 24N. Since the body is moving with constant velocity all the forces must balance (equal & opposite)

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3 years ago

A racing car going a 20 m/s stops in a distance of 20 m.What is its acceleration?​

A racing car going a 20 m/s stops in a distance of 20 m.What is its acceleration?