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MrMuchimi
3 years ago
15

2) In coming to a stop, a car leaves skid marks on a road that are 40 m long.

Physics
1 answer:
Effectus [21]3 years ago
5 0
Lolilolololilolollololililili
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1. A soccer player kicks a soccer ball towards the goal. If she kicks it with a velocity of 24 m/s at an angle of 31 degrees abo
ruslelena [56]

Answer:

<em>The ball will go as high as 8.46 m</em>

Explanation:

<u>Projectile Motion</u>

It's the type of motion that experiences an object launched at a certain height above the ground and moves along a curved path exclusively under the action of gravity.

Being vo the initial speed of the object, θ the initial launch angle, and g the acceleration of gravity, then the maximum height hm can be calculated as follows:

\displaystyle h_m=\frac{v_o^2\cdot \sin^2\theta}{2g}

The soccer ball is kicked at a speed of vo=24 m/s at an angle of θ=31°. Taking the value of g=9.8 m/s^2, then:

\displaystyle h_m=\frac{24^2\cdot \sin^2 31^\circ}{2\cdot 9.8}

\displaystyle h_m=\frac{576\cdot 0.2653}{19.6}

h_m=7.80~m

The ball will go as high as 8.46 m

4 0
3 years ago
Define mass .Also write the table showing the relation of 'kg' with it's sub- multiples and multiples.​
lys-0071 [83]

Answer:

the quantity of matter contained in a body is called mass .si unit of mass is kilogram.weight is effected by gravity but mass is not effected by gravity.

3 0
2 years ago
Read 2 more answers
Which philosopher caused the “death” of the field of chemistry for 2000 years? *
mylen [45]

Answer:

Aristotle

Explanation:

In ancient Greece, the popular

philosopher Aristotle declared

that all matter was made of only

four elements: fire, air, water

and earth. He also believed that

matter had just four properties:

hot, cold, dry and wet.

6 0
3 years ago
The human body uses water in many of its natural processes. water is made of two hydrogen atoms bonded to an oxygen atom. what a
Yuri [45]
1 ; Protons
2 ; Neutrons
3 ; Electrons
5 0
3 years ago
A quarterback throws releases a 400. g football 1.2 meters off of the ground with a speed of 25 m/s. Determine the total energy
Usimov [2.4K]
Kinetic energy is an expression of the fact that a moving object can do work on anything it hits; it quantifies the amount of work the object could do as a result of its motion. And potential energy <span>is the </span>energy<span> that is stored in an object due to its position relative to some zero position. </span><span> We calculate as follows:

KE + PE = mv^2 / 2 + mgh 
Total energy = .4(25)^2/2 + .4(9.81)(1.2)
Total energy = 129.71 J = 130 J <------- OPTION A</span>
4 0
3 years ago
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