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
igor_vitrenko [27]
3 years ago
14

A 55-kg skier starts from rest at the top of a ski jump, point A in Fig. 6–48, and travels down the ramp. If fric- tion and air

resistance can be neglected, (a) determine her speed vB when she reaches the horizontal end of the ramp at B. (b) Determine the distance s to where she strikes the ground at C.

Physics
2 answers:
andre [41]3 years ago
6 0

Explanation:

The first attachment contains the complete question while the second attachment is the solution.

valina [46]3 years ago
5 0

Answer:

a)\,v_b=28.209\,ms^{-1}\\\\b)\,s=108.17\,m

Explanation:

a) According to conservation of energy

K.E_a+P.E_a=K.E_b+P.E_b\\\\\frac{1}{2}mv^2_a+mgh_a=\frac{1}{2}mv^2_b +mgh_b\\\\mg(h_a-h_b)=\frac{1}{2}m(v^2_b-v^2_a)\\

As skier is at rest initially so

v_a=0\\\frac{1}{2}mv^2_b=mg(h_a-h_b)\\\\v_b=\sqrt{2g(h_a-h_b)}\\\\v_b=\sqrt{2(9.8)(45-4.4)}\\\\v_b= 28.209 \,ms^{-1}

B)  The distance s to where she strikes the ground at C:

Horizontal distance covered:

s\,cos\,30^o=s_o+v_bt\\\\s_o=0\\\\s(0.866)=(28.20)t\\\\t=\frac{s}{32.56}--(1)\\

vertical component of distance

s=s_o+v_ot+\frac{1}{2}at^2\\\\s\,sin\,30^o=0+0+\frac{1}{2}(9.8)t^2\\\\s=(9.8)t^2

substituting (1) in above

s=(9.8)\frac{s^2}{1060.1536}\\\\s=108.17\,m

You might be interested in
Two identical speakers are 3.50 m
DiKsa [7]

Answer:

The difference in distance from the speakers is 5.2 - 3.5 = 1.7 m

The listener would be 1/2 wavelength out of phase with the speakers

1/2 y = 1.7 m    where y is the wavelength

y = 3.4 m       the required wavelength

f = v / y = 340 m/s / 3.4 m = 100 / sec     lowest frequency  

6 0
3 years ago
If a freely falling rock were equipped with a speedometer, by how much would its speed readings increase with each second of fal
Klio2033 [76]
Its speed reading would increase to 10 m/s every second 
5 0
3 years ago
4. Brandon throws a tennis ball vertically upward. The ball returns to the point of release after 4.0 s. What is the
vekshin1

Answer:

-39.2m/s

Explanation:

Using the equation of motion;

v = u + at

Since the ball is thrown upward, the acceleration due to gravity acting on it will be negative, hence a = -g

v = u - gt

Since g = 9.8m/s²

t = 4.0s

u = 0m/s

v = 0 + (-9.8)(4)

v = 0 + (-9.8)(4)

v = -39.2m/s

Hence the speed of the ball before release is -39.2m/s

6 0
3 years ago
Which is an example of a solution?
vladimir1956 [14]

Answer:

C

Explanation:

plato

6 0
3 years ago
"Without forces there can be no movement"- Do you agree with this statement? Why or Why not?​
myrzilka [38]

Answer: Yes.

Explanation: It is clearly stated in Newton’s first law of physics that an object will not change its motion unless a force acts on.

6 0
3 years ago
Other questions:
  • In Young’s double-slit experiment using monochromatic light, the interference pattern consists of a central _____.
    14·2 answers
  • Which statement is true if the mass of object A is twice that of object B?
    11·1 answer
  • A balance is best used to measure a sample’s
    12·1 answer
  • heres free wallpapers and pnts! :)) (phone and PC and chromebook wallpapers) (credits to those who made them !)
    5·1 answer
  • Which of the following are examples of etiquette? Check all of the boxes that apply.
    7·1 answer
  • How would the period Of the pendulum different from an equivalent one on earth​
    7·1 answer
  • What type of material is thought to explain the larger size of the outer planets relative to the inner planets
    6·1 answer
  • What is the period and frequency of the second hand on a clock?
    6·1 answer
  • What data will the simulation provide about your design? You will also need a control (something you don’t change) that you can
    5·1 answer
  • Create a Graph : Include numbers, axes, and order pairs
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!