Log In

Question about Dynamics: friction force

Physics

Originais Teachy

Dynamics: friction force

Medium

(Originais Teachy 2023) - Question Medium of Physics

João is helping his mother move a heavy sofa from one room to another in the house. When he tries to push the sofa forward, he realizes that the sofa does not move easily due to the static friction force between the sofa and the floor. Knowing that the sofa has a mass of 80 kg and that the coefficient of static friction between the sofa and the floor is 0.6, answer: a) What is the maximum value of the static friction force that prevents the sofa from moving? b) What is the minimum horizontal force that João needs to apply to start moving the sofa? c) If João applies a horizontal force of 450 N to the sofa, will it start moving? Justify your answer.

Answer sheet:

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Curabitur id consequat justo. Cras pellentesque urna ante, eget gravida quam pretium ut. Praesent aliquam nibh faucibus ligula placerat, eget pulvinar velit gravida. Nam sollicitudin pretium elit a feugiat. Vestibulum pharetra, sem quis tempor volutpat, magna diam tincidunt enim, in ullamcorper tellus nibh vitae turpis. In egestas convallis ultrices.
Emoji eyes

Answer sheet

You need to be a registered teacher to view the answer sheet

Emoji eyes
Iara Tip

IARA TIP

Are you putting together a test or exercise list?

On Teachy’s platform, you can automatically generate these materials without spending hours searching for questions 😉

Those who viewed this question also liked...
Question icon

Question

Difficulty Medium

Source:

Is external icon

FCMCSP

Kinematics: Average Scalar Speed

Question icon

Question

Difficulty Medium

Source:

Is external icon

Teachy

A glass prism is used in a laboratory experiment to separate the colors that make up white light. The prism is in the shape of an equilateral triangle with sides of length 10 cm and a refractive index of 1.5. A monochromatic light beam is incident on the prism and emerges with an angular deviation. For this experiment, consider that the light beam hits the first face of the prism at a 45º angle. (a) Calculate the angle of refraction on the first face of the prism, applying Snell's Law; (b) Determine the angle of incidence of the light beam on the second face of the prism as it passes through it; (c) Using the information obtained in the previous steps, calculate the total angular deviation of the light beam passing through the prism.

Geometric Optics: Prisms

Question icon

Question

Difficulty Medium

Source:

Is external icon

Teachy

Explain what a thermodynamic cycle is and present four examples. Then, solve a problem involving a simple thermodynamic cycle with calculations of exchanged heat, internal energy, and work done.

Thermodynamics: Thermodynamic Cycle

Question icon

Question

Difficulty Hard

Source:

Is external icon

Teachy

The prefix table is used to represent physical quantities more accurately. For example, we can use the prefix 'deci' to represent 0.1 times the unit. If we have 1 decimeter, that means 0.1 meters. Which of the prefixes below means 0.000001 times the unit?

System Prefixes

Community img

Join a community of teachers directly on WhatsApp

Connect with other teachers, receive and share materials, tips, training, and much more!

Teachy logo

We reinvent teachers' lives with artificial intelligence

Instagram LogoLinkedIn LogoTwitter LogoYoutube Logo
BR flagUS flagES flagIN flagID flagPH flagVN flagID flagID flag
FR flagMY flagur flagja flagko flagde flagbn flagID flagID flagID flag

2023 - All rights reserved

Terms of UsePrivacy NoticeCookies Notice