Calculating Net Force and Speed on a Skier: Ramp Problem Explained

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In summary, a ramp problem is a physics problem that involves calculating the motion of an object on a ramp or incline. To solve a ramp problem, one must identify known and unknown variables and use equations such as Newton's second law or the work-energy theorem. Factors such as the angle of the ramp, mass and shape of the object, and coefficient of friction affect the object's motion. Friction can significantly impact an object's motion on a ramp, and real-world applications of ramp problems include determining stopping distance, designing roller coasters, and ensuring wheelchair accessibility in construction.
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Oliviam12
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The Question is:

A skier goes down a slope with an angle of 35 degrees relative to the horizontal. Her
mass, including all equipment, is 70 kg. The coefficient of kinetic friction between her
skies and the snow is 0.15.
A. Please draw a free-body diagram of the skier.
B. Calculate the net force acting on the skier.
C. If the slope is 60 m long, what is her speed at the bottom of the slope,
assuming that she started from rest?

Does this like correct? (Especially B and C, seeing as I have never done this type before)

My A is:
http://img88.imageshack.us/img88/1207/freend1.th.png

My B is:
Fg=-mg
Fg=-70(9.81)
Fg=-686.7 N

Fk= [tex]\mu[/tex]Fg
Fk= .15 (-686)
Fk = -102.9 N

Net Force: -686.7 - -102.9= -583.8 NC.) (The length of the ramp dosn't really matter does it?)
F=MA
-583.8= 70A
-8.34 m/s^2 =A

Thanks!
 
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  • #2
Why isn't anyone answering did I post it wrong or something?
 
  • #3
These questions belong in the homework forums, where I have just moved your posts. (check your private messages) Also, please be patient, as we have a lot of homework questions coming in right now.
 

Related to Calculating Net Force and Speed on a Skier: Ramp Problem Explained

1. What is a ramp problem?

A ramp problem is a physics problem that involves calculating the motion of an object sliding down a ramp or incline. It typically involves using concepts such as force, acceleration, and friction to determine the object's velocity, distance traveled, or other related quantities.

2. How do you solve a ramp problem?

To solve a ramp problem, you first need to identify the known and unknown variables, such as the mass of the object, angle of the ramp, and coefficient of friction. Then, you can use equations such as Newton's second law or the work-energy theorem to calculate the desired quantity.

3. What factors affect the motion of an object on a ramp?

The motion of an object on a ramp is affected by several factors, including the angle of the ramp, the mass and shape of the object, and the coefficient of friction between the object and the ramp. Other factors such as air resistance and the object's initial velocity may also play a role.

4. How does friction impact the motion of an object on a ramp?

Friction is a force that acts in the opposite direction of an object's motion and can significantly affect its motion on a ramp. Friction between the object and the ramp's surface can cause the object to slow down or stop, while friction between the object and the air can also impact its motion.

5. What are some real-world applications of ramp problems?

Ramp problems have many real-world applications, such as determining the stopping distance of a car on a sloped road, calculating the trajectory of a skateboarder on a halfpipe, or designing roller coasters and other amusement park rides. They also have practical applications in engineering and construction, such as determining the angle and length of a ramp for wheelchair accessibility.

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