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3 years ago

When jumping down from a table to the ground, it is helpful to bend your knees when you hit the ground because...

Physics

1 answer:

forsale [732]3 years ago

7 0

Answer:

This reduces the average force applied during the landing process/ or you can say it reduces the impact your body takes.

Explanation:

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What would cause a beam of light to increase in wavelength and bend away from the normal? A) Passing from a round glass into a s

uranmaximum [27]

Answer:

i think it A sorry if i get it wrong but it should be A

Explanation:

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2 years ago

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Describe how compass needle move when it is placed in a magnet ?

bagirrra123 [75]

Answer:

The compass needle will point towards the magnetic field, so if it is in a magnet it will most likely spin around in circles.

Explanation:

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3 years ago

A 16-cm-long straight line connects the center of a turntable to its edge. The turntable rotates counter-clockwise at 45 rpm. A

Bond [772]

Answer:

$\mathbf{V_x = 3.25 \ cm/s}$

$\mathbf{V_y = 1.29\ cm/s}$

Explanation:

Given that:

The radius of the table r = 16 cm = 0.16 m

The angular velocity = 45 rpm

= $45 \times \dfrac{1}{60}(2 \pi)$

= 4.71 rad/s

However, the relative velocity of the bug with turntable is:

v = 3.5 cm/s = 0.035 m/s

Thus, the time taken to reach the bug to the end is:

$t = \dfrac{r}{v}$

$t = \dfrac{0.16}{0.035}$

t = 4.571s

So the angle made by the radius r with the horizontal during the time the bug gets to the end is:

$\theta = \omega t$

$\theta = 4.712 \times 4.571$

$\theta = 21.54^0$

Now, the velocity components of the bug with respect to the table is:

$V_x = Vcos \theta$

$V_x = 0.035 \times cos (21.54^0)$

$V_x = 0.0325 \ m/s$

$\text {V_x = 3.25 \ cm/s}$ $\mathbf{V_x = 3.25 \ cm/s}$

Also, for the vertical component of the velocity $V_y$

$V_y = V sin \theta$

$V_y = 0.035 \times sin (21.54^0)$

$V_y = 0.0129\ m/s$

$\mathbf{V_y = 1.29\ cm/s}$

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3 years ago

A car starts at the top of a hill with 200 J of energy, and rolls down a frictionless surface. The isolated system consists of t

Kamila [148]

Answer:

The total energy stays the same but is converted from being stored as gravitational potential energy into kinetic energy of the car as it moves.

Explanation:

the law of conservation of energy states that the total energy of an isolated system remains constant, and since it is gaining speed that energy will be kinetic

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3 years ago

Hydrogen bombs and stars both produce energy with nuclear ?

Sav [38]

Answer:

If we are talking fusion. Yes they both use nuclear fusion.

if its fission or anything else no.

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3 years ago