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3 years ago

Negative acceleration is also known as

Physics

2 answers:

STALIN [3.7K]3 years ago

8 0

Answer:

Deceleration

Explanation:

The amount by which a speed or velocity decreases

Gala2k [10]3 years ago

4 0

Answer:

Negative Acceleration is called Deceleration.

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A diver shines a flashlight upward from beneath the water (n=1.33) at a 36.2° angle to the vertical. At what angle does the ligh

horrorfan [7]

Answer:

The flashlight leaves the water at an angle of 51.77°.

Explanation:

if n1 = 1.33 is the refractive index of water and ∅1 is the angle at which the flashlight shine beneath the water, and n2 = 1.0 is the refractive index of air and ∅2 is the angle the flashlight leaves the water.

Then, according to Snell's law :

n1×sin(∅1) = n2×sin(∅2)

sin(∅2) = n1×sin(∅1)/n2

= (1.33)×sin(36.2)/(1.0)

= 0.7855055×379

∅2 = 51.77°

Therefore, the flashlight leaves the water at an angle of 51.77°.

7 0

3 years ago

An object of mass 10 kg is at rest when a net force of 20 N acts on it in a direction east. The acceleration produced on the obj

torisob [31]

It's a since a = F / m

6 0

3 years ago

What are the two main ways in which chemical bonds are formed

masha68 [24]

Answer:

The two main types of bonds formed between atoms are ionic bonds and covalent bonds.

Explanation:

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3 years ago

A 57 kg skier starts from rest at a height of H = 27 m above the end of the ski-jump ramp. As the skier leaves the ramp, his vel

Hatshy [7]

Answer:

(a) $h=5.95m$

(b) h is the same

Explanation:

According to the law of conservation of energy:

$E_i=E_f\\U_i+K_i=U_f+K_f$

The skier starts from rest, so $K_i=0$ and we choose the zero point of potential energy in the end of the ramp, so $U_f=0$ . We calculate the final speed, that is, the speed when the skier leaves the ramp:

$mgH=\frac{mv^2}{2}\\v=\sqrt{2gH}\\v=\sqrt{2(9.8\frac{m}{s^2})(27m)}\\v=23\frac{m}{s}$

Finally, we calculate the maximum height h above the end of the ramp:

$v_f^2=v_i^2-2gh\\$

The initial vertical speed is given by:

$v_i=vsin\theta$

and the final speed is zero, solving for h:

$h=\frac{v_i^2}{2g}\\h=\frac{((23\frac{m}{s})sin(28^\circ))^2}{2(9.8\frac{m}{s^2})}\\h=5.95m$

(b) We can observe that the height reached does not depend on the mass of the skier

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4 years ago

17. An uncharged metal rod brought close to but not touching the cap of a charged electroscope caused decrease in the divergence

Furkat [3]

Explanation:

Metals get charged by induction ,the charges are transferred from the electroscope causing earthing: Charges on the electroscope induce opposite charges on the conductor.

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3 years ago