About how many grams are in an ounce of cereal

A spring loaded toy shoots straight upward with a velocity of 4.5 m/s. Determine the maximum height it reaches. Determine the ti

Angelina_Jolie [31]

Recall that

${v_y}^2-{v_{0y}}^2=2a_y(y-y_0)$

At its maximum height $y_{\mathrm{max}}$ , the toy will have 0 vertical velocity, so that

$-\left(4.5\,\dfrac{\mathrm m}{\mathrm s}\right)^2=2\left(-9.8\,\dfrac{\mathrm m}{\mathrm s^2}\right)y_{\mathrm{max}}$

$\implies y_{\mathrm{max}}=1.0\,\mathrm m$

For the toy to reach this maximum height, it takes time $t$ such that

$\dfrac{0+v_0}2t=y_{\mathrm{max}}\implies t=0.46\,\mathrm s$

which means it takes twice this time, i.e. $t=0.92\,\mathrm s$ , for the toy to reach its original position.

The velocity of the toy when it falls 1.0 m below its starting point is

${v_y}^2-\left(4.5\,\dfrac{\mathrm m}{\mathrm s}\right)^2=2\left(-9.8\,\dfrac{\mathrm m}{\mathrm s^2}\right)(0-1.0\,\mathrm m)$

$\implies{v_y}^2=39.85\,\dfrac{\mathrm m^2}{\mathrm s^2}$

$\implies v_y=-6.4\,\dfrac{\mathrm m}{\mathrm s}$

where we took the negative square root because we expect the toy to be moving in the downward direction.

6 0

3 years ago

Three polarizing filters are stacked, with the polarizing axis of the second and third filters at angles of 23.8 ∘ and 65.0 ∘, r

GalinKa [24]

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4 0

4 years ago

1. define feed

Hatshy [7]

Answer:

1.Animal feed is food given to domestic animals in the course of animal husbandry

2.) Roughages B) Concentrates C) Feed supplements and Feed additives

3. Feed grains

4.pliers, vacuum lifters, magnetic lifters, and stock positioners

Explanation:

1.Animal feed is food given to domestic animals in the course of animal husbandry

2.) Roughages B) Concentrates C) Feed supplements and Feed additives

3. Feed grains 

4.pliers, vacuum lifters, magnetic lifters, and stock positioners

7 0

3 years ago

Consider two objects of the same mass. If a force of 100N acts on the first for a duration of 1s and on the other for a duration

kompoz [17]

So velocity=displacement/time and force=mass*acceleration. Both objects have the same acceleration because the amount of time doesn’t play a role in the equation. Momentum equation is p=mv so only the mass and overall velocity matter. Therefore, the answer is c because time is not a variable

6 0

3 years ago

Read 2 more answers

How does Earth's surface and the structures on the surface change as a result of an earthquake?

olga2289 [7]

THE CHANGE IN EARTH SURFACE IS DUE TO VIBRATION AND COLLISION IN EARTH TECTONIC PLATES

Explanation:

VIBRATION is the change in the stable state/equilibrium state caused by increased pressure in a particular object or a surface due to electro magnetic wave
COLLISION is the meeting point of two or more surfaces or the objects
During earthquake the tectonic plates of the earth surface begins to collide or cause any irregular drastic movements
This is due to the vibration caused by earthquake
This causes the shake in the upper surface which results in construction damage and calamities
This causes drastic change in the surface of the earth.

8 0

3 years ago