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3 years ago

A boy pulls a wagon with a force of 6N east as another boy pushes it with a force of 8 N

Physics

2 answers:

NARA [144]3 years ago

4 0

Answer:

14N

Explanation:

Soloha48 [4]3 years ago

4 0

Answer:

14n

Explanation:

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3 years ago

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Leokris [45]

Answer:

0.037 N/m

Explanation:

The web acts as a spring, so it obeys Hook's law:

$F=kx$ (1)

where

F is the force exerted on the web

k is the spring constant

x is the stretching/compression of the web

In this problem, we have:

- The mass of the fly is $m=15 mg=15\cdot 10^{-6} kg$

- The force exerted on the web is the weight of the fly, so:

$F=mg=(15\cdot 10^{-6}kg)(9.81 m/s^2)=1.47\cdot 10^{-4}N$

- The stretching of the web is

$x=4.0 mm=0.004 m$

So if we solve eq.(1) for k, we find the spring constant:

$k=\frac{F}{x}=\frac{1.47\cdot 10^{-4} N}{0.004 m}=0.037 N/m$

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3 years ago

Which of the following is a scalar quantity?

goldfiish [28.3K]

Answer:

C. 100 ft/min

Explanation:

A scalar quantity has no direction.

A scalar with direction is called a vector.

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4 years ago

How can tectonic activity change the climate of the earth?

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4 years ago

A force in the + x-direction with magnitude F(x) = 18.0N -(0.530 N/m)x is applied to a 6.00-kg box that is sitting on the horizo

gogolik [260]

Answer:v=8.17 m/s

Explanation:

Given

F(x)=18-0.530 x

mass of box=6 kg

distance traveled is 14 m

Work done by force

$W=\int_{0}^{14}Fdx$

$W=\int_{0}^{14}(18-0.53x)dx$

$W=\left ( 18x-\frac{0.530}{2}x^2\right )_0^{14}$

$W=252-51.94=200.06 J$

Work done by the force is equal to change in kinetic energy

$W=\frac{mv^2}{2}$

$200.06\frac{6\times v^2}{2}$

$v=8.17 m/s$

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4 years ago