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3 years ago

State the section of the graph (A, B, C, or D) where the car is moving the slowest.

Physics

1 answer:

anastassius [24]3 years ago

5 0

Answer:

D 15m/s

Explanation:

1)you find the speed covered in all the points e.g on speed=distance covered

time taken

a)300m\15s=20m/s

b)rest no distance covered

c)(1000-300)=700m time=(60-35)=25. 700m/25s=28m/s

d)(1200-1000)=300m time=(80-60)=20s

200m/20s=10m/s

thus the lowest speed was 10m/s at D

Average speed=average distance

average time

=1200m/80s. =15m/s

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Explain how competition between organisms affects the availability of resources in an area.

Fynjy0 [20]

Answer:

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3 years ago

A rock falls from a tower that is 320 feet high. As it is falling, its height is given by the formula h equals 320 minus 16 t s

RSB [31]

Answer:

a. 4.5secs

Explanation:

From the question, the equation describing the height is given by

$h(t)=320-16t^{2}\\$

at the point when the rock hit the ground, the height,h will be zero.

Hence we can have

$h(t)=320-16t^{2}\\\\at h(t)=0\\0=320-16t^{2}\\hence \\320=16t^{2}\\t^{2}=\frac{320}{16}\\ t^{2}=20\\t=\sqrt{20}\\ t=4.47secs\\t=4.5sec\\$

hence the rock will hit the ground in 4.5secs

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4 years ago

Un hombre parado en el techo de un edificio, tira una bola verticalmente hacia arriba con una velocidad de 12m/s, la bola llega

zmey [24]

Respuesta:

24m

Explicación:

Según la ecuación de movimiento

v = u + en

Dado

Velocidad final v = 12 m / s

velocidad inicial u = 0 m / s

tiempo t = 4s

Sustituir

12 = 0 + 4a

a = 12/4

a = 3 m / s²

Lo siguiente es obtener la distancia;

S = ut + 1 / 2at²

S = 0 (4) + 1/2 (3) (4) ²

S = 3 * 16/2

S = 48/2

S = 24 m

Por lo tanto, la distancia requerida es de 24 m.

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3 years ago

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3 years ago

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Explanation:

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4 years ago