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yulyashka [42]
3 years ago
5

This diagram shows a skier moving down a hill. Which statement best describes the skier? The skier has potential and kinetic ene

rgy. The skier has only potential energy. The skier has only kinetic energy. The skier does not have potential or kinetic energy.
Physics
2 answers:
kiruha [24]3 years ago
8 0

When skier is moving along the hill we can say that he had some speed by which he is moving down

so his kinetic energy is given as

KE = \frac{1}{2}mv^2

also the height of the person is also there from ground level

so his potential energy is given as

PE = mgh

so here the correct answer would be

<em>The skier has potential and kinetic energy. </em>

astra-53 [7]3 years ago
4 0

The correct answer is:

A. The skier has potential and kinetic energy.

|Huntrw6|

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A block of ice with mass 5.50 kg is initially at rest on a frictionless, horizontal surface. A worker then applies a horizontal
Yuki888 [10]

Answer:

A) 3.13 m/s

B) 5.34 N

C) W = 26.9 J

Explanation:

We are told that the position as a function of time is given by;

x(t) = αt² + βt³

Where;

α = 0.210 m/s² and β = 2.04×10^(−2) m/s³ = 0.0204 m/s³

Thus;

x(t) = 0.21t² + 0.0204t³

A) Velocity is gotten from the derivative of the displacement.

Thus;

v(t) = x'(t) = 2(0.21t) + 3(0.0204t²)

v(t) = 0.42t + 0.0612t²

v(4.5) = 0.42(4.5) + 0.0612(4.5)²

v(4.5) = 3.1293 m/s ≈ 3.13 m/s

B) acceleration is gotten from the derivative of the velocity

a(t) = v'(t) = 0.42 + 2(0.0612t)

a(4.5) = 0.42 + 2(0.0612 × 4.5)

a(4.5) = 0.9708 m/s²

Force = ma = 5.5 × 0.9708

F = 5.3394 N ≈ 5.34 N

C) Since no friction, work done is kinetic energy.

Thus;

W = ½mv²

W = ½ × 5.5 × 3.1293²

W = 26.9 J

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The index of refraction of light varies from color to color. TRUE.
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Which type of tape is used to round sharp edges on splices using larger conductors?
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Rubber tape is used to round sharp edges
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4. A student wants to determine what type of cereal his classmates like best. He buys 3 boxes of his most favorite puffed rice c
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D
The student's conclusion shows experimental bias
Just because most of nis classmates like puffed cereal ,it is inappropriate to conclude puffed cereal is better than oats cereal
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The efficiency of an average gasoline-powered car is about 20%. This means
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Answer:

This means C.the car uses 20% of the energy store in the gasoline for motion.

Explanation:

I hope this helps.

4 0
2 years ago
Read 2 more answers
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