A body with mass of 2 kg is moving with velocity 2 m/s. A short time later the body is moving with velocity of 5 m/s. The total work applied to the body is ....Tolongin kaka" mau di kumpulin sebentar lagi
1. A body with mass of 2 kg is moving with velocity 2 m/s. A short time later the body is moving with velocity of 5 m/s. The total work applied to the body is ....Tolongin kaka" mau di kumpulin sebentar lagi
Jawaban :
Penjelasan:
W = (½ . m . Vt²) - (½ . m . Vo²)
W = (½ . 2 . 5²) - (½ . 2 . 2²)
W = 25 - 4
W = 21 J
2. A small car with mass of 1000 kg is moving eastward with velocity of 30m/s and big car with mass of 2000 kg is moving southward with velocity of 20 m/s.The magnitude of momentum after colliding is..
Penjelasan:
dik : m1 = 1000 kg
v1 = 30m/s
m2 = 2000 kg
v2 = 20 m/s
dit: momentum atau p.... ?
jawab:
karna tidak ada diketahui koefisien dan cuma momentum setelah tabrakan maka menggunakan hukum kekekalan momentum sehingga persamaan seperti ini
p = p'
(m1 x v1) + (m2 x v2) = p'
p' = (1000 x 30) + (2000 x -20)
p' = 30.000 - 40.000
p' = -10.000
jadi besarnya momentum adalah -10.000 atau 10.000... mohon maaf kalau ada yang salah
3. 21. A body with mass of 2 kg is moving with velocity 2 m/s. A short time later the body is moving with velocity of 5 m/s. The total work applied to the body is .... a.25 J b. 24 J c. 23 J d. 22 J e. 21 J
Jawaban:
21 J (E)
Penjelasan:
Known :
m = 2 kg
Vo (initial velocity) = 2 m/s
Vt (final velocity) = 5 m/s
Ask : W
Answer :
[tex]W =\Delta KE\\W = KE_{final}-KE_{initial}\\W = \frac{1}{2} m v_{final}^2- \frac{1}{2}mv_{initial}^2\\W = \frac{1}{2} \times 2 \times 5^2- \frac{1}{2} \times 2 \times 2^2\\W = 25-4\\W= 21 $ joule \\\\Then, the total work applied to the body is 21 J (E)[/tex]
4. a vehicle moving with a uniform acceleration of 2m/s2 has a velocity of 4m/s at a certain time what will the velocity be in 1s later
acc, a = 2 m/s2
Kec. awal, Vo = 4 m/s
t = 1s
Vt = a . t + Vo
Vt = 2 . 1 + 4
Vt = 2 + 4
Vt = 6 m/s
5. A moving body undergoes a change of momentum. what is a unit for change of momentum
Penjelasan:
a unit for change of momentum is kg.m/s
6. Dancing is moving the body together with music
Jawaban:
Menari menggerakkan badan bersama dengan musik
Jawaban:
Menari adalah mengerakkan Badan bersama dengan alunan musik
7. Bumblebee jumps straight upwards with a velocity of 14.0 m/s . Whats is his displacement of after 1.80 s?
Jawaban:
Displacement is 25,2m
Penjelasan:
v = 14 m/s
t = 1,8 s
s = ???
v = s/t
s = v × t
s = 14 × 1,8
s = 25,2 m
8. A 1000 kg car moving east at 5 m/s collides with a 2000 kg car moving east at 2 m/s. After the collision, the 2000 kg car moves east at 5 m/s. a. Determine the total momentum before collision. b. Find the final velocity and direction of the 1000 kg car.
Answersisonthepictureabove.
The 1000 kg car is moving to the opposite of east, meaning it is going west.
Hopeithelps
9. 3.A blade of ceiling fan with radius 0.5 m is rotating with initial angular velocity of0.20 rev sl. The angular acceleration of the blades is 0.80 rev s". In 5.0 s,determine(a)the final angular velocity made by the blade.
Penjelasan:
jadi tinggal dikali semua dah jadi
10. A car is moving with an initial velocity of 20 m/s and then moving with constant acceleration of 4 m/s? The velocity of a car after 20 seconds is ... O a. 120 m/s O b. 150 m/s O C. 80 m/s O d. 100 m/s
Jawaban:
given : v1 = 20 m/s
a = 4 m/s^2
t = 20 s
ask :v2 .... ?
answer :
a = (v2 - v1)/ tv2 = at + v1 = 4×20 + 20 = 100 m/sGood luck....
Jawaban:
d. 100m/s
Penjelasan:
know
Vo=20m/s
a=4m/s²
t=20s
asked
vt=?
solution
The velocity of a car after 20 seconds:
vt=Vo+at
vt=20+4(20)
vt=20+80
vt=100m/s
11. CALC A bird is flying due east. Its distance from a tall building is given by x(t) = 28,0 m + (12,4m/s)t - (0,0450m/s``` ) t``` . What is the instantaneous velocity of the bird when t=8,00 s ?
correct me if i wrong
12. an object with mass of 38 moves with velocity 2 m/s then given force as following figure. determine the velocity after 3 s
Jawaban:
cara
.........................
Penjelasan:
.
...
.
..
13. A ball is initially at rest. The ball is then hit by a stick so that it is moving with velocity of 10 m/s. If the mass of the ball is 250 g, calculate the impuls applied to the ball!
Diketahui :
Vo = 0 m/s (bola diam)
Vt = 10 m/s
m = 0,25 kg
Ditanya :
Impuls?
Jawaban :
Impuls = ∆P
Impuls = m(Vt - Vo)
Impuls = 0,25 kg(10 m/s - 0 m/s)
Impuls = 0,25 kg * 10 m/s
Impuls = 2,5 kg*m/s
Correct me if i wrong
14. A particle moves for 10 s with velocity 4 m/s and then moves with velocity 6 m/s for another 20 s and finally moves with velocity 8 m/s for next 30 s. What is the average velocity of the particle?
Jawaban:
average v= v1 + v2 + v3
3
= (10×4) + (20x6) + (8 x 30)
3
= 40 + 120 + 240
3
= 400 = 133.33 m/s
3
15. A van moves with velocity of 36 km/hour. then it is accelerated with acceleration of 2 m/s². calculate : a) velocity, b) distance traveied in 10 second after the van being accelerated
a) s = 25 m = 0,025 km , t = 5 s = 5/3600 jam , v = 36 km/jam
b) s = 200 m = 0,2 km , t = 10 s = 10/3600 jam , v = 30 m/s^2 = 108 KM/jam
16. the pinion gear a rolls on the gear rack B and C is moving to the right at 8ft/s and C is moving to the left at 4ft/s, determine the angular velocity of the pinion gear and velocity of its center A
Jawaban:
Maayo ra ko pero oo tanga ka
17. A billiard ball rolling across a table to the right at 2.2 m/s makes a head-on elastic collision with an identical ball. The mass of a billiard ball is 36 g. If the first ball is initially moving to the left with a velocity of 1.1 m/s, what is the velocity of the second ball after the collision? Answer..... m/s
Penjelasan:
m1v1 = m2v2 - m1v1'
mv1 = mv2 - mv1'
v2 = v1 + v1'
= 2,2 + 1,1
= 3,3 m/s
bola 1 melaju dgn kec 2,2 setelah tumbukan benda 1 berbalik arah sehingga nilai momentum nya negatif
*ingat momentum juga merupakan vektor*.
18. a car reaches a velocity of 20 m/s with an acceleration of 2 m/s^2 . How far will it travel while it is accelerating if it is (a). initially at rest (b). initially moving at 10 m/s ?
◾ Materi : Kinematika Gerak Lurus
◾ Sub materi : GLBB
◾ Mapel : Fisika
Diketahui :
Vt = 20 m/s
a = 20 m/s²
Ditanya :
s = ?
a) Vo = 0
b) Vo = 10 m/s
Penyelesaian :
*Cari jarak tempuh jika diam
Vt² = Vo² + 2as
20² = 0² + 2(2)s
400 = 4s
s = 100 meter
*Cari jarak tempuh jika Vo = 10 m/s
Vt² = Vo² + 2as
20² = 10² + 2(2)s
400 = 100 + 4s
300 = 4s
s = 75 meter
Jadi, jarak tempuh untuk Vo diam Dan Vo 10 m/s adalah 100 meter dan 75meter
semoga membantu
# sharing is caring #
-vin
19. A train travels with the velocity 15 m / s. The velocity of the train in km/hour is
lanjutan
15×3600 = 54000
= 54000 : 1000
= 54 km/hour
1000 itu dari km ke m
klau 3600 detik sama dgn satu jam
20. A Newtonian fluid is confined between two vertical parallel plate. The surface on the left is stationary and the other is moving vertically at a constant velocity ????0 . Assuming that the flow is laminar solve for velocity profile.
Penjelasan:
translite
Sebuah cairan Newtonian terbatas antara dua paralel vertikal piring. Permukaan sebelah kiri tidak bergerak dan yang lain bergerak secara vertikal pada kecepatan konstan? 0. Anggap saja aliran laminar terselesaikan untuk profil kecepatan.
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