a boy thrown up a ball vertically upward with the speed of 3 m/s. what is the maximum height can reached if acceleration of gravity is 9,8 m/s ?
1. a boy thrown up a ball vertically upward with the speed of 3 m/s. what is the maximum height can reached if acceleration of gravity is 9,8 m/s ?
[tex] v_{o} = 3m^{2} \\ g=9,8m/ s^{2} \\ \\ h_{maks} ....? \\ \\ h_{maks} = \frac{ v_{o} ^{2} }{2g} \\ \\ h_{maks} = \frac{(3)^{2} }{2x9,8} \\ \\ h_{maks} = \frac{9}{19,6} \\ \\ h_{maks} =0,45 m[/tex]
2. A tennis ball is thrown upward with initial velocity of 30 m/s, if g = 10 m/s2. Determine: a. height of the tennis ball at the first 2 seconds.b. velocity of the tennis ball at the first 2 seconds.c. time required by the tennis ball to reach the highest point.
Jawaban:
a. 40m
b. [tex]40m/s[/tex]
c. 3 second
Penjelasan:
KINEMATICS : PROJECTILE MOTION
Known :
Vo = [tex]30 m/s[/tex]
g = [tex]10 m/s^{2}[/tex]
a. height at t=2
[tex]h=Vot-\frac{1}{2}gt^{2}[/tex]
[tex]h= (30)(2) -\frac{1}{2}(10)(2)^{2}[/tex]
[tex]h=40m[/tex]
b. Vt at t=2
[tex]Vt= Vot-gt[/tex]
[tex]Vt = (30)(2) - (10)(2)[/tex]
[tex]Vt = 40 m/s[/tex]
c. time required to reach its highest point (t)
[tex]t= \frac{Vo}{g}[/tex]
[tex]t = 3s[/tex]
3. A ball A is thrown vertically upward from the top of a 30-m-high building with an initial velocity of 5 m/s. At the same instant another ball B is thrown upward from the ground with an initial velocity of 20 m/s. Determine the height from the ground and the time at which they pass.
Jawab:
Penjelasan dengan langkah-langkah:
4. A ball of mass 0.5kg is thrown vertically upwards with a kinetic energy of 100J. Neglecting air resistance calculatea the initial speed of the ballb the potential energy of the ball at its highest pointc the maximum height to which the ball rises
Penjelasan:
given:
m = 0,5 kg
Ek = 100J
Find:
a the initial speed of the ball, Vo =?
b the potential energy of the ball at its
highest point, Ep max=?
c the maximum height to which
the ball rises, h max=?
solutions:
a) Ek = ½.m.Vo²
100 = ½.(0.5).Vo²
100 = 0.25. Vo²
Vo² = 400
Vo = √400
Vo=20m/s
b) Ep max = Ek max = 100J
c) Ep = m. g. h
100 = 0,5. (10). h
100 = 5 h
h = 100/5
hmax=20m
5. a stone was thrown vertically upward the height H meters of the sound after T seconds is given by the formula H equals to 15 T minus 5 ft Square find the height of the stone at one second
sebelum nya saya tanya yang anda tayangkan itu pertanyaanya apa
6. Look at the picture. Choose the correct word.1.aС.Tennis ball is (smaller/bigger) than pingpong ballb. Pingpong ball is (smaller/bigger) than foot ballTennis ball is (smaller/bigger) than pingpong ball.d. The smallest ball is (pingpong ball, foot ball, tennis ball).The biggest ball is (pingpong ball, foot ball, tennis ball).2.lebinin beatlebih ringana. Foot ball is (heavier/lighter) than basket ball.b. Bowling ball is (heavier/lighter) than foot ball.c. Foot ball is (heavierlighter) than bowling balld. The heaviest ball is (bowling ball, foot ball, basket ball).The lightest ball is (bowling ball, foot ball, basket ball).le
Jawaban:
1D
maaf klo salah
cm 1 aja
7. The men are playing tennis ball. The shape of the tennis ball is ....................
The shape of the tennis ball is round
8. An object is thrown vertically up with a speed of 20 m / s. When the object reaches its maximum height is ... s
Penjelasan:
t = Vo / g
t = 20 / 10
t = 2 second
9. A ball is thrown and follows the parabolic path shown above .....
Jawaban:
A ball is thrown and follows the parabolic path shown above ..... = Sebuah bola dilempar dan mengikuti lintasan parabola pada gambar di atas .....
Penjelasan:
Itu ya bahasa indo nya
10. A ball is thrown vertically upwards and reaches its maximum height 2.0 s later a. What is the initial velocity of the ball? b. What is the maximum height that the ball reaches?
Jawaban:
a. 20m/s
b.20m
Penjelasan:
Given : Time taken to reach the maximum height t=2 s
a=−g=−10m/s ^2
The initial velocity of the ball can be calculated by,
Using v=u+at
∴ 0=u−10×2 ⟹u=20 m/s
Using S = ut + 1/2at^2
S = 20.2 + 1/2 (-10)(2)^2
S = 40 + (-20)
S = 20m (the maximum height)
11. the men are playing tennis ball. the shape of the tennis ball is
round thats it
i hope this helps The shape of tennis ball is ball or round
karena, bola tenis [tex] \neq [/tex] benda datar/lingkaran (circle)
12. Is it right that the table tennis ball heavy
Jawaban:
Penjelasan:
Heavy
13. 18. Which is the biggest? a. Basket ball b. Tennis ball c. Ping pong ball
Jawaban:
a. basket ball
Penjelasan:
ukurannya lebih besar!
Jawaban:
Basket ball
more bigger!
14. A ball is fired vertically upwards with a velocity v. It reaches a height h. The same ball is now fired with 2v, new h?
Jawaban:
ufdidgwjevaacacnzmzkddkkddpfkghfidkdfk39
Jawaban:
Air resistance can be ignored.
What is the new height reached by the ball?
4h
Pembahasan
15. The ball is thrown to another side itu kalimat pasive atau aktiv ya
Jawaban:
Aktif
Penjelasan:
Maaf kalo salah
BrainlyTeam
Jawaban:
The ball is thrown to another side itu kalimat pasive atau aktiv ya=
English Bola yang dilempar ke sisi lain adalah kalimat pasif atau aktifJAWAB:AKTIV/AKTIF
Penjelasan:
GOOD LUCK!
#BRAINLY
16. A ball is thrown vertically upwards and reaches its maximum height 2.0 s later a. What is the initial velocity of the ball? b. What is the maximum height that the ball reaches?
Given : Time taken to reach the maximum height t=2 s
a=−g=−10m/s ^2
The initial velocity of the ball can be calculated by,
Using v=u+at
∴ 0=u−10×2 ⟹u=20 m/s
Using S = ut + 1/2at^2
S = 20.2 + 1/2 (-10)(2)^2
S = 40 + (-20)
S = 20m (the maximum height)
17. The ball is thrown to another side aktiv atau paasive
Jawaban:
aktif
Penjelasan:
Maaf kalo salah
#BrainlyTeam
Jawaban:
its an active sentence
18. 3.(+)amanda and anisa are playing table tennis (-)(?)4.(+)my father is buying a tennis racket (-)(?)5.(+)davin beckham is kicking a ball(-)(?)
Jawaban:
3.(-) Amanda and anisa did not playing table tennis
(?) did Amanda and anisa playing table tennis?
4.(-) my father did not buying me a tennis racket
(?) did my father buy me a tennis racket ?
5.(-) David Beckham didn't kick a ball
(?) did David Beckham kicking a ball?
MAAF JIKA ADA KESALAHAN GRAMMAR
19. 2. the tennis ball is small. the basketball is.....
Jawaban:
the basketball is big
itu antonim/lawan kata nya
20. A tennis ball is travelling at 50 m/s and has a kinetic energy of 75 J. Calculate the mass of the tennis ball.
velocity = V = 50 m/s
kinetic energy = Ek = 75 Joule
mass = m = .... ?
[tex]ek = \frac{1}{2} \times m\times {v}^{2} [/tex]
[tex]75 = \frac{1}{2} \times m \times {50}^{2} [/tex]
[tex]75 = \frac{1}{2} \times m \times 2500[/tex]
[tex]75 = 1250 \times m[/tex]
[tex]m = \frac{75}{1250} = 0.06 \: kg[/tex]
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