PHYSICS HIGH SCHOOL

A friend tosses a baseball out of his second floor window with initial velocity of 4.3m/s(42degrees below the horizontal). The ball starts from a height of 3.9m and you catch the ball 1.4m above the ground.a) Calc the time the ball is in the air (ans. 0.48s)
b)Determine your horisontal distance from window (ans. 1.5 m)
c)Calc the speed of ball as you catch it (ans: 8.2m/s)

I dont get what 42 m below the horizontal is, can someone give me direction on how to do this?

Answers

Answer 1

Answer:

Answer:

Part a)

$t = 0.48 s$

Part b)

$x = 1.5 m$

Part c)

$v = 8.23 m/s$

Explanation:

As we know that the velocity of ball is

$v = 4.3 m/s$

now the two components of velocity is given as

$v_x = 4.3 cos42 = 3.19 m/s$

$v_y = 4.3 sin42 = 2.88 m/s$

Part a)

now in Y direction we will have

$y = y_o + v_y t + (1)/(2)gt^2$

$1.4 = 3.9 - 2.88 t - 4.9 t^2$

so we have

$t = 0.48 s$

Part b)

Now the distance covered by the ball in horizontal direction is given as

$x = v_x t$

$x = 3.19 * 0.48$

$x = 1.5 m$

Part c)

speed in x direction will always remain the same

so we have

$v_x = 3.19 m/s$

speed in y direction is given as

$v_y = v_i + at$

$v_y = 2.88 + (9.8)(0.48)$

$v_y = 7.58 m/s$

So final speed will be

$v = √(v_x^2 + v_y^2)$

$v = 8.23 m/s$

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Jake drops a book out of a window from a height of 10 meters. At what velocity does the book hit the ground? Answer choices: A: 7.0Meters/Second B: 10Meters/Second C: 14Meters/Second D: 28Meters/Second

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Jake drops a book out of a window from a height of 10 meters. The velocity does the book hit the ground is 14 m/s. hence option C is correct.

What is velocity?

Velocity is defined as the pace at which an item changes position while moving in one direction, as seen from a certain point of view and as measured by a specific unit of time. Given that it has both a magnitude and a direction, velocity is a vector quantity. Velocity measures movement that begins in one location and moves to another location.

We are aware that V=final velocity and V2-U2=2.

U is the initial velocity, and A is the acceleration, and D is the distance, therefore V=14 m/s.

Thus, Jake drops a book out of a window from a height of 10 meters. The velocity does the book hit the ground is 14 m/s. hence option C is correct.

To learn more about velocity, refer to the link below:

brainly.com/question/18084516

#SPJ2

C is your answer. we know V^2-U^2=2 as where V=final velocity.
U is inital velocity
A= acc.
s= distence
a.t.q
v^2 -o^2 =(2*9.8*1o)
so, V=14 m/s

Please help me! Ill give brainliest who helps me first!!!!What is one difference between mixtures and pure substances?
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B. mixtures are made of one type of atom
C. pure substances have no chemical bonds
D. pure substances can be physically separated

Answers

i think it’s A hope this helps

Mixtures can be physically separated (I believe)

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Th correct answer to this question would be, Insulator. Notice in the question it says "Material". The question is basically asking, What item resists the flow of and electric current. A resistor is a device that suppose to strain the electric current. And resistance is the measure of how well the material can conduct an electric charge. With all of that being stated, Insulator materials include paper, dry wood, rubber, glass, ect. Insulator products provides resistance.

Make sure you read the questions very carefully.

Answer: Insulator

Explanation: Insulators stop electric currents from going through

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