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3 years ago

Why is a motorcycle helmet padded?

2 answers:

7 0

Motorcycle helmets are padded to give the rider the protection they require in case of accidents. Any hit to the head is absorbed by the padding and the rider is saved from any kind of fatal injury. Whenever a motorcycle rider falls from his motorcycle, there is every possibility that the head will hit the ground first. If the padding was not there, then the rider would get the direct impact of hitting. As most of the pressure of the hit gets absorbed by the inner padding of the helmet, so the rider is saved from the fatal accident. It does not mean that the driver will not have minor injuries but by all chance his life would be saved.

algol133 years ago

7 0

Motorcycle helmets are padded in case of an accident. If you fall or get into a crash, your head head will be protected because the padded area makes it softer.

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Add the following vectors using head-to-tail method and verify your results using the component method.

Oxana [17]

Answer:

See attached image for the requested graphs.

Part 1 : Vector sum is about 9.4 cm long in the graph, from components: about 9.35 cm long. Percent difference = 0.5%

Part 2: Vector sum is about 7.6 cm long in the graph and from components: 7.57 cm long. Percent difference = 0.4%

Explanation:

Part 1.

The graphical addition of the three vectors A, B and C gives a vector sum of approximately 9.4 cm at an angle of about 84 degrees

The component form addition is

Ax + Bx + Cx = 3.5 + 0 + (-2.5) = 1

Ay + By + Cy = 2.0 + 3 + 4.3 = 9.3

Magnitude: $\sqrt{1^2+9.3^2} \approx 9.35\,\,cm$

The percent difference is: (9.4-9.35) * 100 /9.35 = 0.5%

Part 2.

The graphical addition of the four vectors (A, B, C, and D) measures approximately 7.6 cm at an angle of about 124 degrees.

The component form addition is

Ax + Bx + Cx + Dx = 3.5 + 0 + (-2.5) + (-5.2) = -4.2

Ay + By + Cy + Dy = 2.0 + 3 + 4.3 + (-3) = 6.3

Magnitude = $\sqrt{(-4.2)^2+6.3^2} \approx 7.57\,\,cm$

The percent difference is: (7.6-7.57) * 100 /7.57 = 0.4%

6 0

3 years ago

For a home sound system,two small speakers are located 52 cm closer to the listener than the other.for what value of the fundame

Iteru [2.4K]

Answer:

did yyou finish the quiz?

Explanation:

5 0

3 years ago

Read 2 more answers

Which type of friction force acts when there is no motion?

rosijanka [135]

Its called static friction.

3 0

3 years ago

The Apollo Lunar Module was used to make the transition from the spacecraft to the Moon's surface and back. Consider a similar m

ivolga24 [154]

Answer:

v=6.05 m/s

Explanation:

Given that,

Th initial velocity of the lander, u = 1.2 m/s

The lander is at a height of 1.8 m, d = 1.8 m

We need to find the velocity of the lander at impact. It is a concept based on the conservation of mechanical energy. So,

$\dfrac{1}{2}mv^2-\dfrac{1}{2}mu^2=W\\\\\dfrac{1}{2}mv^2-\dfrac{1}{2}mu^2=F\times d\\\\\dfrac{1}{2}mv^2-\dfrac{1}{2}mu^2=mgd\\\\\dfrac{1}{2}m(v^2-u^2)=mgd\\\\v^2-u^2=2gd$

v is the velocity of the lander at the impact

g is the acceleration due to gravity on the surface of Mars, which is 0.4 times that on the surface of the Earth, g = 0.4 × 9.8 = 3.92 m/s²

So,

$v=\sqrt{u^2+2gd} \\\\v=\sqrt{(1.2)^2+2\times 9.8\times 1.8} \\\\v=6.05\ m/s$

So, the velocity of the lander at the impact is 6.05 m/s.

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3 years ago

NEED HELP RIGHT AWAY!!! Answer all of the following questions in complete sentences and use supporting details. 1. Analyze: In t

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1). the total voltage between the ends of the series circuit was constant.
The resistance of the circuit and the current through the circuit changed.

2). The voltage between the end terminals of the parallel circuit is constant.
The resistance of the circuit and the current through the circuit changed.

3). So that you can avoid building a circuit that needs more current
than your battery can supply, and also to be sure and choose a battery
or power supply that's able to deliver the amount of current that your
circuit needs.

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3 years ago