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Gnom [1K]
1 year ago
5

Examine the image shown here. Bike helmets like this one have padding made of foam under the hard exterior of the plastic. The f

oam is what is in contact with the head of the wearer. These are safer in an accident than a non-foam padded helmet for which reason? A) The foam increases the inertia. B) The foam increases the momentum. C) The foam increases the time of impact. D) The foam decreases the time of impact.
Physics
1 answer:
LenKa [72]1 year ago
8 0

The foam decreases the time of impact.

<h3 />

<h3>What is Impulse?</h3>

The Impulse applied to an object causes a change in the momentum of the object. Impulse is the product of force and time of impact.

J = Ft

where;

  • J is the impulse
  • F is the applied force
  • t is the time of impact

The increase in the time of impact increases the impulse experienced by the object, and a decrease in the time of impact causes a decrease in the impulse experienced by the object.

Thus, we can conclude that the foam decreases the time of impact because it cushions the effect of impact.

Learn more about impulse here: brainly.com/question/25700778

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B. If all plants are watered at least once a day then they will all grow at least 1 cm a day.

All plants grow at different rates.

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A fisherman notices that his boat is moving up and down periodically without any horizontal motion, owing to waves on the surfac
Lemur [1.5K]

Answer:

a)   v = 0.9167 m / s,  b)  A = 0.350 m,  c)  v = 0.9167 m / s, d)  A = 0.250 m

Explanation:

a) to find the velocity of the wave let us use the relation

          v = λ f

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           λ = x

           λ = x

the period is the time for the wave to repeat itself, in this case t = 3.00 s corresponds to half a period

          T / 2 = t

           T = 2t

period and frequency are related

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we substitute

           v = x / 2t

           v = 5.50 / 2 3

           v = 0.9167 m / s

b) the amplitude is the distance from a maximum to zero

          2A = y

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           A = 0.350 m

c) The horizontal speed of the traveling wave (waves) is independent of the vertical oscillation of the particles, therefore the speed is the same

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d) the amplitude is

           A = 0.500 / 2

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alexandr402 [8]

Answer:

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Safety needs includes the personal security, the safety of health, resources and property. etc.

Physiological needs falls at the lowest level of basic needs. It includes food, water, rest. etc which are necessary for an individual's survival.

Esteem includes the need of respect and self-confidence.

Cognitive needs includes the desire of knowledge, to know things, to know what is happening and why is it happening around you.

<u>In Mariah's case</u><u>, she needed respect and motivation and thus she was trying to fulfill her esteem needs by winning the marathon.</u>

<u />

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