A CD has a diameter of 12.0 cm and is rotating at an angular velocity of 10.0 rad/s. If the CD has a constant angular deceleration of -0.5 rad/s2, then the angular velocity of the CD after 3.0 s  is​

1. A CD has a diameter of 12.0 cm and is rotating at an angular velocity of 10.0 rad/s. If the CD has a constant angular deceleration of -0.5 rad/s2, then the angular velocity of the CD after 3.0 s  is​

Penjelasan:

v=v0+at

=10rad/s+(-0,5)rad/s²×3s

=10rad/s-1,5rad/s=8,5rad/s

2. 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

3. 3.A car moves with constant velocity of 30km/hour. The distance traveled after 5minutes is...​

Jawaban:

2.5 km

Penjelasan:

Speed = 30 km/hour

= 30 km/60 minutes

= 0.5 km/minutes

Distance after travel 5 minutes =

0.5 x 5 = 2.5 km

4. 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

5. 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

6. 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

7. How would you describe the horizontal motion of a projectile launched at an angle?A. It has a uniform horizontal aceelerationB. It has a varying horizontal velocityC. It has a constant horizontal accelerationD. It has a uniform velocityWITH EXPLANATION!​

Jawaban:

Bagaimana Anda menggambarkan gerakan horizontal proyektil yang diluncurkan pada suatu sudut?

A. Memiliki percepatan horizontal yang seragam

B. Memiliki kecepatan horizontal yang bervariasi

C. Ini memiliki percepatan horizontal yang konstan

D. Ini memiliki kecepatan yang seragam

DENGAN PENJELASAN!

Soalx :

How would you describe the horizontal morion of a projectile laundched at an angle??

Jawaban :

C. It has a constant horizontal acceleration

Penjelasan:

Horizontal memiliki makna terletak pada garis atau bidang yang sejajar dengan horinzon atau garis datar : mendatar

Semoga membantu

ANSWER BY : Naysa#NoCopas#NoErorr#NoNyontex#Siapa yang menghapus jawaban ku berarti dia berdosa

8. How would you describe the horizontal motion of a projectile launched at an angle?A. It has a uniform horizontal aceelerationB. It has a varying horizontal velocityC. It has a constant horizontal accelerationD. It has a uniform velocity-With explanation-​

Jawaban:

A.memiliki percepatan horizontal beragam

A. It has a uniform horizontal aceeleration

9. 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

10. If the angular velocity of a circular motion is w,its frequency is...Hz

KINEMATIKA

• Gerak Melingkar

ω = w

f = __?

ω = 2π f

w = 2π f

f = w / (2π) Hz ✔️

11. 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

12. A 10N force is needs to move an object with a constant velocity of 5m/s. What Power must be delivered to the object by the force?

P = W/t = (F s)/t = F x s/t = F x (v) = 10 x 5 = 50Wattp=w/t p=FV then p=10 x 5= 50 watt okay

13. john rides his bike 49 miles with a constant speed of 12mph and another 29 miles with a constant speed of 12mph what is his average speed for the total trip?​

12 MPH

because john's bike in both distances covered has a constant speed of 12mph therefore the average speed that john travels is around

12mph=(12mph+12mph)÷2

OPTIONAL

(whilst the time it takes for john to complete both distances is about

49miles+29miles=78 miles divided by the average speed around 12mph equals 6,5 hours.

(49÷12)+(29÷12)=4,0833333+2,41666=6,5 hours)

14. 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.

15. 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

16. Mohon bantuannya ya... 1. A disc rotates at a constant angular velocity of 4rad/s. The mass of the disc is 200g and the radius is 4cm. The angular momentum of the disc rotation is... Kg m2/s 2. A 2m-long rope is wound on a wheel shaft. The rope is pulled with the force of 40N. When the rope is released, the wheel rotates at an angular acceleration of 2rad/s2. Assuming that there is no friction, the wheel's moment of inertia is...kg m2

1. 50 Kg m2/s
2. 20 kg m2

17. a rigid body rotates about a fixed axis through a point in the body,with uniform angular velocitt at 600 rpm.The velocity then decreases at a constant retardatiob to 300 rpm in 6 s .Determine the number of revolution had turned through in the 6.0 s

Jawaban:

45 revolution = 45 kali putaran lihat gambar

Penjelasan:

lihat gambar

18. what is the net force on an 800 kg airplane flying with a constant velocity of 160 km/hour north ​

Jawaban:

Punten kak, izin menjawab yaa..

Penjelasan:

According to Newton's Law (ll)

F = m.a

Because base on the question above that plane's velocity is constant, so delta v or we called "acceleration" is zero "0".

So, value of F on Newton's Law (ll) as follow:

F = 800 × 0 = 0

19. 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/s

Good 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

20. the rotational speed of a grinder can be accelerated by 2 rad/s^, when it is used. if the initial angular velocity of the grinder is 10 rad/s and its initial angular position is 4 radians, the equation of the grinder's angle each time is........rad

α = 2 rad/s²
ωo = 10 rad/s
θo = 4 rad

θ = θo + ωo.t + ½ α.t²
θ = 4 + 10t + ½ (2)t²
θ = 4 + 10t + t²