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3 years ago

The cushion is picked up and put on the couch. A work is being done. B no work is being done

Physics

2 answers:

Goshia [24]3 years ago

5 0

Work is being done because picking up a cushion and putting it somewhere is the motion of doing something (work).

aleksklad [387]3 years ago

4 0

Hello there.

The cushion is picked up and put on the couch. A work is being done. B no work is being done

Option (A)

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an athlete sprints from 150 m south of the finish line to 65 m south of the finish line in 5.0s what is his average velocity

MatroZZZ [7]

Total displacement=150-65m=85m
Time=5s

$\\ \rm\longrightarrow Avg\:Velocity=\dfrac{Total\:Displacement}{Total\:Time}$

$\\ \rm\longrightarrow Avg\:Velocity=\dfrac{85}{5}$

$\\ \rm\longrightarrow Avg\:Velocity= 17m/s$

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how fast will and in what direction will a 20kg object accelerate if one force pushes at a 30 degree angle and another pushes at

DiKsa [7]

Answer:

$|a|=2.83\ m/s^2$

$\theta=75^o$

Explanation:

Net Force And Acceleration

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$\vec F_n=m\vec a$

The net force is the vector sum of all forces. In this problem, we are not given the magnitude of each force, only their angles. For the sake of solving the problem and giving a good guide on how to proceed with similar problems, we'll assume both forces have equal magnitudes of F=40 N

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$\vec F_1=$

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The components of the second force are

$\vec F_2=$

$\vec F_2=\ N$

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$\vec F_n=$

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$\displaystyle |a|=\frac{56.57}{20}$

$|a|=2.83\ m/s^2$

The direction of the acceleration is the same as the net force:

$\displaystyle tan\theta=\frac{54.64}{14.64}$

$\theta=75^o$

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3 years ago

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Answer:

Explanation:

vf=vi+at

vi=5.82 m/s

a=2.35 m/s2

t=3.25 s

vf=5.82+2.35*3.25

vf=5.82+7.64

vf=13.46

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If you place bean seeds between moist paper towels and watch the stems and leaves appears,you will see a demonstration of??

Alenkinab [10]

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maxonik [38]

Answer:

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