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sp2606 [1]
3 years ago
8

Any change in an object's velocity is caused by

Physics
2 answers:
Archy [21]3 years ago
6 0

Answer:

<h3>C. an unbalanced force </h3>

Explanation:

<h3>I hope it helps ❤❤</h3>
Anarel [89]3 years ago
4 0
C. An unbalanced force
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A golfer tees off from the top of a rise, giving the golf ball an initial velocity of 44 m/s at an angle of 25° above the horizo
mars1129 [50]

Answer:

a) y=17.6m

b) v_{x}=39.87m/s\\v_{y}=-28.05m/s

Explanation:

From the exercise we got our <u>initial data</u>

v_{o}=44m/s\\\beta =25\\x=190m

a) To find <u><em>maximum height</em></u> we know that at that point v_{y}=0

v_{y} ^{2} =v_{oy} ^{2} +2a(y-y_{o} )

0=(44sin25)^{2} -2(9.8)y

Solving for y

y=\frac{(44sin25)^{2} }{2(9.8)} =17.6 m/s

b) Since we know that the ball strikes the fairway 190 m away

x=v_{ox}t\\ 190=44cos25t

Solving for t

t=4.76s

Now, we can calculate the speed of the ball in both axes

v_{x}=44cos25=39.87m/s

v_{y}=v_{oy}+at

v_{y}=44sin25-(9.8)(4.76)=-28.05m/s

The <em>negative</em> sign means the direction of the ball at that point.

5 0
4 years ago
What is physics? Why is it important in our life​
-Dominant- [34]

Answer:

It helps us to know or be aware of some things that happen regular and teaches us about laws that guide us

8 0
4 years ago
Read 2 more answers
(b) Figure 3.32 shows the orbit of a planet around the Sun. Compare the linear speed of the planet at positions X, Y and Z.
Viefleur [7K]

At Z ... slowest speed

At Y ... fastest speed

At X ... medium speed

Wherever it is in its orbit, the line from the planet to the Sun smears over the same amount of area every second.

That's Kepler's second law of planetary motion.

The reason this happens is: That's how gravity works. (A better explanation is available, but first you have to be able to twirl calculus and solid geometry in the air on long sticks.)

5 0
3 years ago
How are electromagnets different from regular magnets?
Digiron [165]

Answer:                    all of the above

Explanation:

5 0
4 years ago
What is photosynthesis, food chain, evaporation and passive smokers?​
navik [9.2K]

Answer:

Photosynthesis: the process where plants convert light energy into sugar, for food

Food chain: a series of organisms showing which organisms eat each other

Explanation:

7 0
3 years ago
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