A little girl pushes a 5.0 kg toy baby stroller at constant speed 7.0 m across the floor. She pushes on the handle with a force of 40 N at an angle of 30o with the horizontal. All parts are 4 points each.

Answers

Answer 1

Complete Question

1 a A little girl pushes a 5.0 kg toy baby stroller at constant speed 7.0 m across the floor. She pushes on the handle with a force of 40 N at an angle of 30o with the horizontal.  How much work is done by the girl on the wagon?

1b  A farmhand pushes 20 ㎏ bale of hay 4m across the floor of the barn if she exerts a horizontal force of 60 N on the hay, how much work is done? (5 pts)

All parts are 4 points each

Answer:

1a

  [tex]W = 242.5 \ J[/tex]

1b

    [tex]W = 240 \ J[/tex]

Explanation:

Considering question a

From the question we are told that

       The mass of the toy baby stroller is  [tex]m = 5.0 \ kg[/tex]

        The distance covered is    [tex]d = 7.0\ m[/tex]

          The force the girl applies on the handle  is  [tex]F = 40 \ N[/tex]

          The angle at which this force is applied is  [tex]\theta = 30^o[/tex]

Generally the workdone is mathematically represented as

          [tex]W = F_x * d[/tex]

Here  [tex]F_x[/tex] is the force along the horizontal axis , this is mathematically represented as

           [tex]F_x = F cos (\theta )[/tex]

=>         [tex]F_x = 40 * cos(30 )[/tex]

=>         [tex]F_x = 34.64 \ N[/tex]

So

              [tex]W = 34.64 * 7[/tex]

=>           [tex]W = 242.5 \ J[/tex]

Considering question b

From the question we are told that

       The mass of the toy baby stroller is  [tex]m = 20 \ kg[/tex]

        The distance covered is    [tex]d = 4 \ m[/tex]

          The force the girl applies on the handle  is  [tex]F = 60 \ N[/tex]      

Generally the workdone is mathematically represented as

          [tex]W = F * d[/tex]

=>     [tex]W = 60 * 4[/tex]

=>     [tex]W = 240 \ J[/tex]


Related Questions

When 26400j of energy is supplied to a 2.0kg bloom of aluminum it temperature rise from 20oc to 35oc.The block is well so there is no energy lost to sorround determine the specific heat capacity of aluminum

Answers

Answer:

880J/kelvin

Explanation:

Q =MC ×change in t

c =C/m

C=Q/change in t

c= Q/ m× change in t

c = 26400 / 2.0 × 15

c = 880 J/kelvin

Other Questions
Which of these statements describe you? Check all that apply.I have participated in an online discussion forum.I am comfortable speaking before large groups.I have led small or large group discussions in the classroom.I prefer working in groups rather than working on my own.I am able to share my thoughts on a topic with ease when participating in group discussions.I have been part of an online meeting that required me to use web-conferencing software. Someone can you help me?A group of people gathers in a busy city area to hold a protest. The police force them to leave because they are blocking traffic. The leader of the group says the police have no right to stop them, that they have the right to assembly. The police ask the leader to see the group's permit from the city, but the group doesn't have one.Based on the scenario, which statement is true?a. The group has a right to form a protest, but the city has the right to prevent any assembly if the leaders do not like its goals.b. The group has the right to assembly, but the city has the right to enforce rules to protect public safety during an assembly.c. The group has an unlimited right to assembly, and the police should leave the group alone or protect it from traffic.d. The group has no right to organize a protest, and the police should arrest all the members for refusing to leave. Which statement best describes the difference between charter colonies and proprietary colonies? A. Charter colonies were governed by religious groups, whereas proprietary colonies were governed by financial investors. B. Charter colonies were governed by democratic institutions, whereas proprietary colonies were governed by the king. C. Charter colonies were governed by financial institutions, whereas proprietary colonies were governed by town councils. D. Charter colonies were governed by companies, whereas proprietary colonies were governed by individuals or families. Rewrite y+3=(x5) in standard form . how can I writing essay Which of the following activities make Spanish class boring for Marco?A practicar la grticaB escribir cuentosC escuhar msica espnolD escrib correos electrnicos Which of the following has increased tensions between the US and China in the twenty-first century? O A. Cyber -espionage O B. Chinese naval operations in the Mexican Gulf O C. Poorly manufactured products US interference in China's elections There are 130 people in a sport centre. 61 people use the gym.68 people use the swimming pool.60 people use the track.25 people use the gym and the pool.30 people use the pool and the track.19 people use the gym and the track.6 people use all three facilities.Given that a randomly selected person uses the gym and the track, what is the probability they do not use the swimming pool? I need help with like 3 or 4 questions please help PLEASE ANSWER FAST I NEED HELPPP Why do you think that the circus was mainly for plebes? evaluate the role of king tribhuwan to establish democracy in nepal What did Principal do when Junie B. told him the poem?He made her write it.He began laughingHe sent her to help clean the lunchroom.He told her to draw pictures to go with it. Mildred has a bag of coins. The bag contains 10 dimes, 5 nickels, and 1 penny. She will randomly select 2 coins from the bag one at a time without replacement. What is the probability that Mildred will select a dime first and then a penny? On pages 53 and 54, Tobias writes about the garderobes and the gong farmer. What do these words and these wntries show about life in the middle ages cassandra has a loan of 35,720.This loan has a simple intrest rate of 4% per year.What is the amount of intrest will pay on this loan at the end of 2 year? PLEASE DONT JOKE AROUND THIS IS MY TEST.A. 2,857.60B. 38,577.60C. 1,428.80D. 5,715.20 Editing is only necessary when writing short stories.o Trueo FalsePls help ASAP Help help help help help help pls Pls help me!! And thank you so much A school is going on a field trip to the zoo. There were s amount of students. The tickets cost $15 each. The school ended up giving the zoo $2,550 for all of the tickets. Write and solve an equation to figure out how many students are going on the trip.Step by step