A child of mass 15.0-kg skis from rest straight down a nursery slope. Since the child has no idea how to o do a wedgie and has her skis parallel, friction may be ignored in part A. The nursery slope can be described as a ramp of constant gradient, with a length of 8.00-m in the direction parallel to the surface. The child reaches a speed of 5.30 m/s at the bottom. What is the angle between the ramp and the horizontal? ► View Available Hint(s) Submit Part B ΤΗ ΑΣΦ IVO [VD ΑΣΦ v2 = 5.46 → What would be the speed of the child at the bottom if the motion were opposed by a constant friction force of 10.5- N pa to the surface of the ramp? ▸ View Available Hint(s) 5 ? ? Review I Constants m/s

A child of mass 15.0-kg skis from rest straight down a nursery slope. Since the child has no idea how to o do a wedgie and has her skis parallel, friction may be ignored in part A. The nursery slope can be described as a ramp of constant gradient, with a length of 8.00-m in the direction parallel to the surface. The child reaches a speed of 5.30 m/s at the bottom. What is the angle between the ramp and the horizontal? ► View Available Hint(s) Submit Part B ΤΗ ΑΣΦ IVO [VD ΑΣΦ v2 = 5.46 → What would be the speed of the child at the bottom if the motion were opposed by a constant friction force of 10.5- N pa to the surface of the ramp? ▸ View Available Hint(s) 5 ? ? Review I Constants m/s

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter5: Energy

Section: Chapter Questions

Problem 75AP: A ski jumper starts from rest 50.0 m above the ground on a frictionless track and flies off the...

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Concept explainers

Spring Potential Energy

The potential energy is the energy possessed by a body by virtue of its position or the energy held by the object due to its position relative to other objects, its force like stresses, charge, and other factors affecting the particles of the body. The potential energy is the measure of the net work done by or on the body. The spring potential energy is the potential energy stored due to the deformation of an elastic spring and this elasticity is due to the stretched spring. The elasticity is the ability of a solid-state matter to come back to its equilibrium position or original position after any kind of external force is acted on it. It is also known as Elastic potential energy. The potential energy here is caused due to the displacement of the spring from its equilibrium position to another position and this potential energy is equal to the net work done due to the stretching of the spring. It also resembles the same mechanics of the oscillation of a simple pendulum, where due to the external force, the object moves from its equilibrium position to its maximum ends and the periodic motion continues till it comes back to the equilibrium position to rest. 

Question

A child of mass 15.0-kg skis from rest straight
down a nursery slope. Since the child has no idea
how to do a wedgie and has her skis parallel,
friction may be ignored in part A. The nursery slope
can be described as a ramp of constant gradient,
with a length of 8.00-m in the direction parallel to
the surface. The child reaches a speed of 5.30
m/s at the bottom.
What is the angle between the ramp and the horizontal?
► View Available Hint(s)
o =
ΠΕ ΑΣΦ
Submit
Part B
VO ΑΣΦ
?
What would be the speed of the child at the bottom if the motion were opposed by a constant friction force of 10.5-N parallel
to the surface of the ramp?
► View Available Hint(s)
v2 = 5.46
?
Review I
Constants
m/s

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