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defon
4 years ago
12

Why does the cyclist have less kinetic energy at position A than at position B?

Physics
1 answer:
Semmy [17]4 years ago
6 0
Suppose that the cyclist begins his journey from the rest from the top of a wedge with a slope of a degree above the horizontal.
 At point A (where it starts its journey), the energy is:
 Ea = m * g * h
 In other words, energy is only potential.
 At point B (located at the bottom of the wedge), the energy is:
 Eb = (1/2) * (m) * (v ^ 2)
 In other words, the energy is only kinetic.
 For energy conservation we have:
 Ea = Eb
 That is, we have that all potential energy is transformed into kinetic energy.
 Which means that the cyclist has less kinetic energy at point A because that's where he has more potential energy.
 answer:
 the cyclist has less kinetic energy at point A because that's where he has more potential energy.
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A 5 kg fish swimming 2 m/s swallows an absent minded 1 kg fish swimming toward it at a velocity that brings both fish to a halt
Gelneren [198K]

Answer:

v = 10 m/s

Explanation:

given,

Mass of large fish, M = 5 Kg

speed of swimming, v' = 2 m/s

mass of small fish, m = 1 kg

speed of the fish = v

using conservation of momentum

m v + M v' = M u' + m u

final speed of both the speed is zero.

- 1 x v + 5 x 2  = 0

negative sign is used because small fish is moving in opposite direction.

now,

v = 10 m/s

hence, the speed of the small fish is equal to 10 m/s.

8 0
4 years ago
Niagara Falls is a set of very large waterfalls located on the border between New York and Ontario, Canada. Over 200,000 cubic f
PSYCHO15rus [73]

Answer:

a) kinetic energy and gravitational potential energy

Explanation:

The water at the top of the fall possesses kinetic energy because the water is in motion, moving.

The water at the top also possess gravitational potential energy because it is falling under the influence of gravity. It is in a gravitational field.

8 0
3 years ago
Read 2 more answers
Acetic acid (HC2H3O2) is an important ingredient of vinegar. A sample of 50.0 mL of a commercial vinegar is titrated against a 1
butalik [34]

Answer:

The concentration of acetic acid present in the vinegar is 0.113M

Explanation:

1. As the titration occurs between an acid and a base is called neutralization. The balanced chemical reaction between the acetic acid and the NaOH is:

NaOH+HC_{2}H_{3}O_{2}=NaC_{2}H_{3}O_{2}+H_{2}O

2. Calculate the moles of NaOH used, taking in account the concentration of NaOH 1.00M:

5.65mL*\frac{1.00molesNaOH}{1000mLNaOH}=0.00565molesNaOH

3. Calculate the number of moles of acetic acid neutralized using stoichiometry:

0.00565molesNaOH*\frac{1molHC_{2}H_{3}O_{2}}{1molNaOH}=0.00565molesHC_{2}H_{3}O_{2}

4. Calculate the concentration of acetic acid present in the vinegar:

\frac{0.00565molesHC_{2}H_{3}O_{2}}{50.0mLvinegar}*\frac{1000mLvinegar}{1Lvinegar}=0.113M

5 0
3 years ago
The image shows a pendulum in simple harmonic motion. The pendulum starts at A and swings to E.
Genrish500 [490]

D: Velocity is decreasing. Acceleration is increasing.

A: Velocity is zero.

7 0
3 years ago
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What happens to the energy of a wave as it moves away from its source?
Eddi Din [679]

Answer:

As the particles move further away from their normal position (up towards the wave crest or down towards the trough), they slow down.

Explanation:

This means that some of their kinetic energy has been converted into potential energy – the energy of particles in a wave oscillates between kinetic and potential energy. Hope that this helps you and have a great day :)

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