You toss a tennis ball straight upward. At the moment it leaves your hand it is at a height of 1.5 m above the ground, and it is moving at a speed of 7.0 m/s.

(a) How much time does it take for the tennis ball to reach its maximum height? (s)

(b) What is the maximum height above the ground that the tennis ball reaches? (m)

(c) When the tennis ball is at a height of 2.4 m above the ground, what is its speed? (m/s)

Answers

Answer 1

a). 1.2 s

b). 3.81 m

c) v= 6.8 m/s

d) v= 27.05 m/s

What is speed?

Speed is define as the distance per unit time. It is also define as how fast an object is  moving.

According to the question:

Height = 1.5 m , speed = 7.0 m/s.

a)By using 1st equation of motion

[tex]V = V_{0} + g*t.\\V = 0 \\V_{0} = 7.0 m/s.g = -9.8 m/s^2\\0 = 7 + (-9.8 m/s^2)*t\\t = 1.2 s[/tex]

b.

[tex]h = 1.5 + V_{0} *t + 0.5g*t^2\\V_{0} = 7.8 m/s\\t = 1.2s , g = -9.8 m/s^2\\h = 3.81 m[/tex]

c.

[tex]V^2 = V_{0} ^2 + 2g*d\\V_{0} = 7.8 m/s\\g= -9.8 m/s^2.\\d= 2.2-1.5 = 0.7 m\\V = 6.8 m/s[/tex]

d.

[tex]V^2 = V_{0} ^2 + 2g*h\\V_{0} = 0\\g = +9.8 m/s^2.\\h = 6.8 m\\V = 27.05 m/s[/tex]

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you push on box g that is next to box h, causing both boxes to slide along the floor, as shown in the figure. the reaction force to your push is

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The reaction force to your push is the push of box G against you.

Newton's third law states that:

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a bubble of air of volume 1cm^3 is released by a deep sea diver at a depth where the pressure is 4.0 atmospheres. assuming its temperature remains constant (T1=T2), what is its volume just before it reaches the surface where the pressure is 1.0 atmosphere?

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Answer:

hope this helps!

Explanation:

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Answers

Answer:

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Answer:

1.127,56,000m

2. 347,600,000

3. 384,000

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13. 450000000 mg

14.    23,000g to 90,000g

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Answer:

Hello, Rotting, burning, cooking, and rusting are all further types of chemical changes because they produce substances that are entirely new chemical compounds. For example, burned wood becomes ash, carbon dioxide, and water. When exposed to water, iron becomes a mixture of several hydrated iron oxides and hydroxides.

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I hape this helps remember to make someone smile today

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Answer:

Sketch the situation.

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The potential energy of the car at that position is 10.6 x 10⁵ J.

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Potential energy of an object is defined as the energy acquired by the object by virtue its position.

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Mass of the car, m = 1200 kg

Speed of the car, v = 29 m/s

Height of the cliff, h = 90 m

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PE = 10.6 x 10⁵ J

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Please help me. Brainiest to the correct answer.

A computer uses 40W of power. Calculate the current it draws when connected to a 230V mains supply.

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Answer:

0. 174 A

Explanation:

This is similar to your other question

[tex]\boxed{\mathfrak{Power(P)=Voltage(V) \times Current(I)}}[/tex]

Voltage (V) = 230 VPower (P) = 40 W

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=> [tex]\mathsf{I=\frac{40}{230} }[/tex]

=> I = [tex]\mathsf{\frac{4}{23} }[/tex]

=> I = 0.174 A

I is the current, the computer draws when connected to a 230 V mains supply, and it's SI unit is Amperes.

                               

[tex]\mathfrak{\overline{There\: you \: are!}}[/tex]

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The car traveled a distance of 9km and the displacement was 3km


Consider the diagram of a pendulum's motion shown above. A pendulum can be used to model the change from potential energy
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A.point A
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Answer: D

Explanation: Potential stores Kinetic Energy so, Point C will have Kinetic turned into Potential.

Answer: the answer is D

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