1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
djyliett [7]
4 years ago
13

1. A snowboarder of mass 60 kg is at rest on the top of a sand dune. The coefficients of static and kinetic friction are 0.55 an

d 0.4675, respectively. 60 kg μk = 0.4675 μs = 0.55 What is the angle the incline must exceed so that the snowboarder starts sliding? The acceleration of gravity is 9.8 m/s2 . Answer in units of ◦. 2. What is the acceleration down the incline if = 35 ◦, exceeding the value found in the previous question? Please help. I am so confused.
Physics
2 answers:
diamong [38]4 years ago
7 0

Answer:

Inclined angle must exceed 26.57°

Acceleration = 1.17m/s^2

Explanation:

Mg= 60× 9.8=588N

Fp= force on inclined plain

Fp=588sinA

Fn=588cosA= normal force

Fs= us×Fn= 0.55(588cosA)= 323.4cosA

Fp-Fs=ma

588sinA - 323.4cosA=60×0

588sinA=323.4cosA

Dividing by 588

SinA=0.5cosA

But sinA/cosA = Tan

Tan A=0.5

Tan^-0.5 = 26.57°

Weight(x) - Fn= ma

Sin35mg - ucos 35mg = ma

Dividing through by m gives

Sin35g- ucosg= a

0.5736×9.8)- (0.55×0.8192×9.8) =a

5.62- 4.42=a = 1.17m/s^2

Zigmanuir [339]4 years ago
6 0
Im stuck to i need help
You might be interested in
A bowling ball with a mass of 4.5 kg travels at a velocity of 37 m/s for 2.5 s until it is stopped at the end of the lane by the
Goryan [66]
Weight = (mass) x (acceleration of gravity) We know the mass. All we need now is the acceleration of gravity. All that other stuff about velocity and time is chaff, launched to confuse our radar.
8 0
3 years ago
Read 2 more answers
What is the recurvate react
deff fn [24]
Bent or curved backwords

3 0
4 years ago
slader A steel bar is 150 mm square and has a hot-rolled finish. It will be used in a fully reversed bending application. Sut fo
allochka39001 [22]

Answer:

(a) 98.548 mPa

(b) N = 942346

9.42 X 10∧5 cycles

Explanation:

The solved solution is in the attach document.

6 0
4 years ago
Horizontal angulation is: Select one: a. the side-to-side angulation. b. different when using the paralleling and bisecting tech
statuscvo [17]

Horizontal angulation is Select one: a. the side-to-side angulation. b. different when using the paralleling and bisecting techniques.

Angles that are horizontal. relates to the central ray's placement in a horizontal, or side-to-side, plane.

A picture with an overlap of nearby structures in the horizontal plane is produced by situating the central ray such that the horizontal angulation is not directed through the interproximal contacts of the adjacent teeth (the contact areas of the teeth are superimposed over each other).

Fracture angulation refers to a particular kind of fracture displacement in which the bone's natural axis has been changed so that the distal end now points off in a different direction. When using a bite-wing tab, the x-ray beam's center ray must be pointed at the contact points between teeth. The x-ray beam must be centered on the receptor to guarantee that the receptor is exposed.

Learn more about horizontal angulation  here brainly.com/question/28043105

#SPJ4.

8 0
2 years ago
Easiest way to Find fahrenhiet to celsius please i need necessary 20 for the fastest correct answer​
FromTheMoon [43]

Answer:

thx for the points

Explanation:

no need brainliest

7 0
3 years ago
Other questions:
  • Consider the Sun and Earth as a single system. How does the law of conservation of energy apply to this system? A) The energy fr
    11·2 answers
  • A battery-operated car utilizes a 120.0 V battery with negligible internal resistance. Find the charge, in coulombs, the batteri
    11·1 answer
  • Please help and thank you :)
    10·1 answer
  • Where are ribosomes made?
    11·1 answer
  • 1. En un diagrama PV trace las trayectorias para cada uno de los siguientes procesos que ocurren en forma sucesiva en un sistema
    13·1 answer
  • A small water pump is used in an irrigation system. The pump takes water in from a river at 10oC, 100 kPa at a rate of 5 kg/s. T
    11·1 answer
  • On the report evaluation, the teacher wrote, "Good idea, but you
    9·1 answer
  • Which of the following phases of the Moon produces the highest and lowest tides on Earth?
    11·1 answer
  • The blades of a ceiling fan starting from rest reach an angular velocity of 22 rad/s
    15·1 answer
  • Please help me for this ex​
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!