Question

A 35 kg child slides down a playground slide at a constant speed. The slide has a height of 3.8 m and is 7.6 m long. Using the law of conservation of energy, find the magnitude of the kinetic friction force acting on the child.

Answer #1

A child whose weight is 190N slides down a playground slide that
makes an angle of 29 degrees with a horizontal and has a length of
9.4m. The coefficient of kinetic friction between the slide and the
child is 0.35.
a) What is the height of the slide?
b) What is the change in gravitational potential energy of the
child?
c) Draw the free-body diagram of the child
d) Calculate the frictional force on the child
e) How much energy...

A child whose weight is 242 N slides down a 7.40 m playground
slide that makes an angle of 41.0° with the horizontal. The
coefficient of kinetic friction between slide and child is 0.0950.
(a) How much energy is transferred to thermal energy? (b) If she
starts at the top with a speed of 0.440 m/s, what is her speed at
the bottom?

A child whose weight is 281 N slides down a 6.10 m playground
slide that makes an angle of 47.0° with the horizontal. The
coefficient of kinetic friction between slide and child is 0.160.
(a) How much energy is transferred to thermal
energy? (b) If she starts at the top with a speed
of 0.311 m/s, what is her speed at the bottom?

A child whose weight is 325 N slides down a 9.2 m playground
slide that makes an angle of 30° with the horizontal. The
coefficient of kinetic friction between slide and child is 0.20. If
she starts at the top with a speed of 0.55 m/s, what is her speed
at the bottom?

A child whose weight is 325 N slides down a 9.2 m
playground slide that makes an angle of 30° with the horizontal.
The coefficient of kinetic friction between slide and child is
0.20. If she starts at the top with a speed of 0.55 m/s, what is
her speed at the bottom?
A.11 m/s
B.33 m/s
C.22 m/s
D.9 m/s

A student of mass 65.4 kg, starting at rest, slides down a slide
18.2 m long, tilted at an angle of 32.1° with respect to the
horizontal. If the coefficient of kinetic friction between the
student and the slide is 0.133, find the force of kinetic friction,
the acceleration, and the speed she is traveling when she reaches
the bottom of the slide. (Enter the magnitudes.)
HINT
(a)
the force of kinetic friction (in N)
N
(b)
the acceleration (in...

A child of mass m slides down a slide inclined at 31.5° in time
t1. The coefficient of kinetic friction between her and the slide
is μk. She finds that if she sits on a small sled (also of mass m)
with frictionless runners, she slides down the same slide in time
1/2t1. Find μk.

A child with mass m = 16.6 kg slides down a slide 4.50 m high,
and reaches the bottom with a speed of 1.00 m/s. How much thermal
energy (in Joules) was generated in the process? Answer to two
decimal places.

An 8.70-kg block slides with an initial speed of 1.80 m/s down a
ramp inclined at an angle of 25.3 ∘ with the horizontal. The
coefficient of kinetic friction between the block and the ramp is
0.87. Use energy conservation to find the distance the block slides
before coming to rest.

If you slide down a rope, it's possible to create enough thermal
energy to burn your hands or your legs where they grip the rope.
Suppose a 35 kg child slides down a rope at a playground,
descending 1.0 m at a constant speed. How much thermal energy is
created as she slides down the rope? Assume that all potential
energy can be transformed into thermal energy.

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