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3 years ago

Please help me do this problem

Physics

1 answer:

Digiron [165]3 years ago

4 0

Answer:

i) acceleration from B to D is 0, because the velocity is constant (stays the same)

ii) whatever units of distathat might be, we can calculate the number:

for 4 time-steps (2 to 6) the velocity is 6 per time step, that makes 24 distance units in these 4 time steps. it's the same the area underneath the graph.

there is also the vertical line from 0 to 2. we can calculate that distance like the area of a triangle with 2*6 / 2 = 6

the total distance from 0 to D is therefore 30

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A 0.15 kg baseball falls to the ground with an acceleration of 9.8 m/s2. What is the weight of the baseball?

bagirrra123 [75]

Answer:

1.47 N

Explanation:

Weight: Weight can be defined as the gravitational pull on a body. The S.I unit of weight is Newton (W).

Weight is a vector quantity and as such it can be expressed in both magnitude and direction

The formula of weight is given as,

W = mg ..................... Equation 1

Where W = weight of the base ball, m = mass of the base ball, g = acceleration due to gravity of the base ball.

Given: m = 0.15 kg, g = 9.8 m/s².

Substitute into equation 1

W = 0.15(9.8)

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4 years ago

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Answer:

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3 years ago

In a compound, chemical energy is contained in the ______________________

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3 years ago

On a spinning ride at the fair, it is inertia that keeps you moving in a circle. true or false

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False, the inertia does not keep us moving in a circle on a spinning ride at the fair.

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Similarly, if an object resembles at rest, then the inertia will be acting against the force tending to move that stationary object. So, on a spinning ride at fair, when a person sits there, the inertia acting on the person will prevent the person to falling down from the fair and not in moving in a circle.

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3 years ago

A stone is thrown straight up from the ground with an initial speed of 44 m/s.At the same instant, a stone is dropped from a hei

Lubov Fominskaja [6]

Answer:

394.26 m

Explanation:

t = Time taken

u = Initial velocity

v = Final velocity

s = Displacement

a = Acceleration due to gravity = 9.8 m/s²

$v=u+at\\\Rightarrow 0=44-9.8\times t\\\Rightarrow \frac{-44}{-9.8}=t\\\Rightarrow t=4.49 \s$

$s=ut+\frac{1}{2}at^2\\\Rightarrow s=44\times 4.49+\frac{1}{2}\times -9.8\times 4.49^2\\\Rightarrow s=98.77\ m$

$s=ut+\frac{1}{2}at^2\\\Rightarrow 98.77=0t+\frac{1}{2}\times 9.8\times t^2\\\Rightarrow t=\sqrt{\frac{98.77\times 2}{9.8}}\\\Rightarrow t=4.49\ s$

Total time taken by the stone to reach the ground is 4.49+4.49 = 8.97 seconds

$s=ut+\frac{1}{2}at^2\\\Rightarrow h=0t+\frac{1}{2}\times 9.81\times t^2\\\Rightarrow t=\sqrt{\frac{h\times 2}{9.8}}$

The times are equal so,

$8.97=\sqrt{\frac{h\times 2}{9.8}}\\\Rightarrow h=\frac{8.97^2\times 9.8}{2}\\\Rightarrow h=394.26\ m$

The height is 394.26 m

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3 years ago