Question

A skier (m=55.0 kg) starts sliding down from the top of a ski jump with negligible friction and takes off horizontally. If h = 4.70 m and D = 12.3 m, find H. Find her total kinetic energy as she reaches the ground

Answer #1

A skier of mass 59.0 kg starts from rest at the top of a ski
slope of height 62.0 m .
b) Now moving horizontally, the skier crosses a patch
of soft snow, where the coefficient of friction is μk =
0.250. If the patch is of width 66.0 m and the average force of air
resistance on the skier is 180 N , how fast is she going after
crossing the patch?
c) After crossing the patch of soft snow, the...

A 90 kg skier starts from the top of a hill with a 19 deg slope.
The skier reaches the bottom of the slope 11 s later.
a) If there is a constant friction force of 70 N which resists
his motion, how long must be the incline of the hill?
b) Draw a force diagram for the skier with labels and
magnitudes.
c) What is the coefficient of kinetic friction between the block
and ramp?
d) How much work...

A 79.0-kg skier starts from rest and slides down a 36.0-m
frictionless slope that is inclined at an angle of 15.0° with the
horizontal. Ignore air resistance.
(a) Calculate the work done by gravity on the skier and the work
done by the normal force on the skier. Work done by gravity? Work
done by normal force?
(b) If the slope is not frictionless so that the skier has a
final velocity of 4 m/s, calculate the work done by...

A 20-kg rocket sled is sliding up a 30 degree, 10-m high snow
ski jumping hill from rest with constant thrust. The kinetic
friction coefficient between the sled and snow is 0.2. The engine
is turned off when the sled leaves the hill and it lands 50-m away
from where it left the hill at ground level. The drag due to air
resistance is negligible. What is the magnitude of thrust of the
rocket sled?
Edit: This is the question...

A skier slides straight down an incline of 25 degrees without
using her poles. The slope itself is 96 meters long, and the skier
starts from rest at the top. a. What would the velocity of the
skier be at the bottom of the incline if friction can be neglected?
b. What would your answer be to the previous question if the
coefficient of kinetic friction between the skis and the snow is
0.13 on the incline? c. Upon reaching...

A 10 kg box slides down a long, frictionless incline of angle
30°. It starts from rest at time t = 0 at the top of the
incline at a height of 18 m above ground.
(a) What is the original potential energy of the box relative to
the ground?
---J
(b) From Newton's laws, find the distance the box travels in 1 s
and its speed at t = 1 s.
---m
---m/s
(c) Find the potential energy and...

A 41.0-kg skier with an initial speed of 1.5 X 101 m/s coasts up
a 2.50-m-high rise as shown below. The coefficient of friction
between her skis and the snow is 0.0800. a) Where do you define the
gravitational potential energy Ug to equal 0 J? b) If the skier has
energy at the bottom of the hill state what kind it is and
determine its value. c) If the skier reaches the top of the hill
what kind of...

A 50.0-kg skier starting from rest travels 200 m down a hill
that has a 60.0° slope and a uniform surface. When the skier
reaches the bottom of the hill, her speed is 20.0 m/s. What is the
magnitude of the friction force if the skier travels directly down
the hill? Please show work. A. 375 N B. 55.3 N C. 89.4 N D. 50.0 N
E. 20.7 N

A)
A skier starts down a 29 ∘ slope. After a vertical drop
of 34 m , the slope temporarily levels out and then drops
at 23 ∘ an additional 38 m vertically before
leveling out again. The coefficient of kinetic friction on both
slopes is 0.11, the level stretches is frictionless.
What is the skier's speed on the higher level stretch?
What is the skier's speed on the lower level
stretch?
b)
What is the current in a 45 kΩ resistor with
150 Vacross it?
c)
A 14 kg projectile is launched...

A 62.0-kg skier is moving at 6.10 m/s on a frictionless,
horizontal, snow-covered plateau when she encounters a rough patch
4.10 m long. The coefficient of kinetic friction between this patch
and her skis is 0.300. After crossing the rough patch and returning
to friction-free snow, she skis down an icy, frictionless hill 2.50
m high.
a) How fast is the skier moving when she gets to the bottom of
the hill?
b)How much internal energy was generated in crossing...

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