2 years ago

A baseball is thrown vertically into the air with a speed of 24.7 m/s.

Physics

1 answer:

zmey [24]2 years ago

7 0

Answer:

57.7

Explanation:

3.14 × 23 + - 78 = 57.7

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A shell is fired at an angle of 35° above the horizontal at a velocity of 40 m/s. (a) What is it's speed at the highest point of

Fudgin [204]

Answer:

Part a)

$v_f = v_x = 32.77 m/s$

Part b)

T = 4.68 s

Explanation:

Part a)

Shell is fired at speed of 40 m/s at angle of 35 degree

so here we have

$v_x = 40 cos35 = 32.77 m/s$

$v_y = 40 sin35 = 22.94 m/s$

since gravity act opposite to vertical speed of the shell so at the highest point of its trajectory the vertical component of the speed will become zero

so at the highest point the speed is given

$v_f = 32.77 m/s$

Part b)

After completing the motion we know that the displacement of the object will be zero in Y direction

so we have

$\Delta y = 0$

$0 = v_y t - \frac{1}{2}gt^2$

$T = \frac{2v_y}{g}$

$T = \frac{2(22.94)}{9.81} = 4.68 s$

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3 years ago

The period (T) of an oscillating wave is 1/5s. What happens to the frequency (f) of the wave if T increases to 1/2s

Anastasy [175]

Frequency = 1/T
as the 5 is reduced, frequency is increase.
as 1 whole wave travels through a point in a lesser time now

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2 years ago

A piece of wood and a piece of steel are at the same temperature; however, the steel feels hotter. This is because the steel has

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The steel traps the heat more making it hotter,you put this twice by the way.

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This property of matter describes<br> the relationship of mass to volume?

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Density is a physical property that describes the relationship between mass and volume. Density is the amount of matter in a given space, or volume.

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