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3 years ago

15

A player kicks a soccer ball from ground level and sends it flying at an angle of 30 degrees at a speed of 26 m/s. What is the v

ertical velocity component of the ball to the nearest m/s?

1 answer:

Leokris [45]3 years ago

3 0

Answer: 13.0m/s

Explanation:

26sin(30)=v in y-direction or vertical direction

v=26m/s*sin(30)=26m/s*(1/2)=13.0m/s

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A ball is thrown straight up. What can be said about the sign of work done by the force exerted by gravity while the ball moves

dolphi86 [110]

Answer:

I think the answer is E....

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3 years ago

Cold air holds less water than warm air.<br> True<br> False

Vsevolod [243]

Answer:

The answer is for your question is :

Explanation:

True

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3 years ago

The "Garbage Project" at the University of Arizona reports that the amount of paper discarded by households per week is normally

Lorico [155]

Answer:

54%

Explanation:

We are given that

S.D=4.2 lb

Mean= $\mu=9.4 lb$

We have to find the percentage of household throw out at least 9 lb of paper a week.

Normal distribution formula :

$P(X\geq a)=P(z\geq \frac{a-\mu}{\sigma})$

We have a=9

$P(X\geq 9)=P(z\geq \frac{9-9.4}{4.2})=P(z\geq -0.1)$

$P(X\geq 9)=1-P(z$

$P(X\geq 9)=1-0.4602=0.5398\times 100=54$ %

Hence, the percentage of household throw out at least of paper a week=54%

7 0

3 years ago

A drag racing vehicle travels from 0 to 100mph north in 5 seconds. What is the acceleration

kap26 [50]

The acceleration of the car is $8.9 m/s^2$

Explanation:

The acceleration of an object is given by

$a=\frac{v-u}{t}$

where

v is the final velocity

u is the initial velocity

t is the time elapsed

Here we have to convert the initial and final velocity of the vehicle into SI units. So we have:

$u = 0$ is the initial velocity

$v=100 mph \cdot \frac{1609 m/mi}{3600 s/h}=44.7 m/s$ is the final velocity

t = 5 s is the time elapsed

Solving for a, we find the acceleration:

$a=\frac{44.7-0}{5}=8.9 m/s^2$

Learn more about acceleration:

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#LearnwithBrainly

5 0

4 years ago

A car accelerates at a rate of 3 m/s^2. If its original speed is 8 m/s, how many seconds will it take the car to reach a final s

kkurt [141]

Answer:

$\Large \boxed{\mathrm{5.67 \ seconds }}$

Explanation:

$\displaystyle \mathrm{acceleration \ = \ \frac{final \ velocity - initial \ velocity }{elapsed \ time}}$

$\displaystyle A \ = \ \frac{V_f - V_i }{t}$

$\displaystyle 3 \ = \ \frac{25 - 8 }{t}$

$\displaystyle 3 \ = \ \frac{17 }{t}$

$\displaystyle t \ = \ \frac{17 }{3} \approx 5.67$

4 0

3 years ago