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3 years ago

Which of the graphs describes the motion of a person who first rode her bicycle at constant speed and then rested?

Physics

1 answer:

sergeinik [125]3 years ago

5 0

Answer:

Its graph 1

Explanation:

She started at the origin and kept riding her bike until she stopped which causes the line to go staright because she's not moving.

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A child with mass 40 kg sits on the edge of a merry-go-round at a distance of 3.0 m from its axis of rotation. The merry-go-roun

yarga [219]

Answer:No

Explanation:

Given

mass $m=40 kg$

$N=0.4 rev/s$

$\omega =0.8\pi rad/s$

time $t=10 s$

using

$\omega =\omega _0+\alpha \cdot t$

$0.8\pi =\alpha 10$

$\alpha =0.08\pi rad/s^2$

at t=5 s

$\omega _2=0+\alpha 5$

$\omega _2=0.4\pi rad/s$

tangential acceleration $a_t=\alpha r$

$a_t=0.08\pi \times 3=0.08\pi=0.754 m/s^2$

centripetal acceleration $a_c=(\omega _2)^2r$

$a_c=(0.4\pi )^{2}\times 3=4.73 m/s^2$

$a_{net}=\sqrt{(a_c)^2+(a_t)^2}$

$a_{net}=\sqrt{(4.73)^2+(0.754)^2}$

$a_{net}=\sqrt{22.941}$

$a_{net}=4.789 m/s^2$

maximum frictional force $=\mu mg$

$F_r=0.6\times 40\times 10=235.2 N$

maximum Force due $a_{net}=m\times a_{net}$

$=40\times 4.789=191.58 N$

$F_s> ma$

Therefore child does not fall

6 0

4 years ago

A toy train is traveling along a circular track

Molodets [167]

Answer:

0.25 m

Explanation:

a = v² / r

4.0 m/s² = (1.0 m/s)² / r

r = 0.25 m

3 0

3 years ago

In which parts of a plant would u expect phototropism to occur?

Lubov Fominskaja [6]

Answer:

chloroplasts

Explanation:

Most plant shoots exhibit positive phototropism, and rearrange their chloroplasts in the leaves to maximize photosynthetic energy and promote growth.

3 0

3 years ago

Read 2 more answers

Fehling's solution is added to the counters of test tube b after about 3 minutes and it turns brick red.what food substance was

hjlf

The food substance being used which turned Fehling's solution to brick red is a reducing sugar.

<h3>What is Fehling's solution?</h3>

This is an indicator which is used to test for the presence of reducing sugar or aldehydes in a solution.

Brick red precipitate of copper(I) oxide is formed when it tests positive to compounds such as glucose etc.

Read more about Fehling solution here brainly.com/question/3262179

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6 0

2 years ago

While operating a vehicle on any highway of this state, it is illegal to physically hold or support a wireless device with any p

algol13

Answer:

True

Explanation:

In Massachusetts it's illegal to drive while texting or on your phone.

3 0

4 years ago