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3 years ago

Define fundamental unit.

Physics

1 answer:

Sever21 [200]3 years ago

7 0

Answer:

Those units which are independent of each other are called fundamental unite. there are seven fundamental unite of seven fundamental quantities

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A car weighing 10.7 kN and traveling at 13.6 m/s without negative lift attempts to round an unbanked curve with a radius of 64.0

erica [24]

a) 3156 N

b) Yes

Explanation:

When a car moves along a curved road, the frictional force between the tires and the road must provide the required centripetal force in order to keep the car in circular motion.

Therefore, the frictional force must be equal to the centripetal force:

$F_f=m\frac{v^2}{r}$

where:

m is the mass of the car

v is the speed of the car

r is the radius of the curve

In this problem, we have:

$mg=10.7 kN = 10,700 N$ is the weight of the car, so the mass of the car is

$m=\frac{mg}{g}=\frac{10700}{9.8}=1092 kg$ is the mass

r = 64.0 m is the radius of the curve

v = 13.6 m/s is the speed of the car

Therefore, the magnitude of the frictional force is

$F_f=(1092)\frac{13.6^2}{64.0}=3156 N$

The magnitude of the force of static friction between the tires and the road is given by

$F_f=\mu mg$

where

$\mu$ is the coefficient of friction

m is the mass of the car

$g=9.8 m/s^2$ is the acceleration due to gravity

In this problem,

$\mu=0.39$ is the coefficient of friction

m = 1092 kg is the mass

So the force of friction is

$F_f=(0.39)(1092)(9.8)=4174 N$

And we see that this force is larger than the centripetal force calculated in part a) and required to keep the car in circular motion: therefore, yes, the coefficient of friction is large enough to keep the car along the curve.

7 0

3 years ago

Question 4

EleoNora [17]

Answer:

D. 75 watts

Explanation:

brainliest please? i've just answered 3 of your questions and they were all correct! :) i hope i helped!

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3 years ago

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You are walking down a straight path in a park and notice there is another person walking some distance ahead of you. The distan

sveta [45]

Answer:

18.8m

Explanation:

This implies calculating the relative speed first then find the distance d

relative speed = 2.75- 1.25 = 1.5 m/s

So assume the distance between them to be say d

so, d/1.5= 12.5

d = 18.8m

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3 years ago

If you could visit Pangaea, what animals would you most likely find there?

katen-ka-za [31]

1B
2D
3C
4A
5B
6D
7B
8C
9A
10C

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1 Do alien exist<br>2 why sky is blue<br>3 what is the weight of sky<br>4 why occasion is blue

snow_lady [41]

1. Yes it is most likely that aliens exist because we have a whole universe yet to discover and us humans can’t be the only species alive
2. Blue light travels faster than any other color in the color prism and is scattered throughout more in the sky than other colors
3.

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3 years ago

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Define fundamental unit.​

Define fundamental unit.