Newton's Law: sliding down a slope

In summary, a snow sled with a total mass of 80.0 kg is being lowered at a constant speed down a slope of 60.0° for a distance of 14.0 m. The coefficient of kinetic friction between the sled and the snow is 0.290. The question asked for the work done by the friction force when the sled slides down this slope. Using the equations Ffr = µf(mgcos theta) and Fnet = Wsin theta - F friction, the values for Fw and Ff were found to be 541N and 124N respectively. However, the equation for work could not be found, as the formula Fnet = Fw-T-Ff = 0 was
  • #1
Nigzzzz
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A snow sled, with total mass 80.0 kg, is lowered at constant speed down a slope of angle 60.0° with respect to the horizontal, for a distance d = 14.0 m. The coefficient of kinetic friction between the sled and the snow is 0.290.

Note: g = 9.80 m s–2.

1. What is the work done by the friction force when the sled slides a distance d down the inclined slope?
Equations tried using:
Fnet = F1 + F2 + F3
Ffr = µf(mgcos theta)
Fnet = Wsin theta - F friction
i found the Fw to be 541N and the Ff to be 124N but then i seem to get lost on how to get tension force to get the net work done by friction, i used the formula Fnet = Fw-T-Ff = 0
Fw - Ff = T = 416N then got stuck
 
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  • #2
I do not see an equation for work - which is what you are supposed to find. What is it?
 

Related to Newton's Law: sliding down a slope

1. What is Newton's Law?

Newton's Law, also known as the Law of Inertia, states that an object at rest will remain at rest and an object in motion will continue in motion at a constant velocity unless acted upon by an external force.

2. How does Newton's Law apply to sliding down a slope?

When an object is sliding down a slope, it is in motion and will continue moving at a constant velocity unless acted upon by an external force such as friction or gravity.

3. Does the mass of an object affect its acceleration when sliding down a slope?

Yes, according to Newton's Second Law, the acceleration of an object is directly proportional to the force applied to it and inversely proportional to its mass. This means that a heavier object will experience less acceleration when sliding down a slope compared to a lighter object.

4. Can an object ever reach a constant velocity while sliding down a slope?

Yes, if the object experiences a balanced force, it will reach a constant velocity while sliding down a slope. This means that the force of gravity pulling the object down the slope is equal to the force of friction pushing against the object's motion.

5. How does the angle of the slope affect an object sliding down?

The angle of the slope affects the amount of force acting on the object and therefore its acceleration. A steeper slope will result in a greater force of gravity pulling the object down, leading to a faster acceleration. On the other hand, a shallower slope will result in a lower force of gravity and a slower acceleration.

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