# physics help ; )

1.(a)A centrifuge accelerates from rest with an angular acceleration of 30rad/s^2.What is the angular velocity of the centrifuge after 30s?(b)The angular velocity of an auto mobile engine accelerates from 800rpm to 3000rpm in 15s.calaculate the engines angular acceleration.

Angualar velocity final=intial w + angular acceleration* time

In the second part, change rpm to radians/sec^2

1. 👍 0
2. 👎 0
3. 👁 168
1. A 200kg satellite is circling the earth in an orbit of radius 7.0x10^6 m in radius. At this radius the acceleration due to gravity is 8.2 m/s2. The speed of the satellite is?

1. 👍 0
2. 👎 0
posted by chico
2. vaegina

1. 👍 0
2. 👎 0

## Similar Questions

1. ### Physics

A centrifuge is spinning at 3600 rev/min, and when turned off, it rotates 50 times before coming to a stop. A) What is the initial angular velocity? B) What is the angle (in radians) that the centrifuge passes through before

asked by Mike on March 5, 2008
2. ### Physics

A centrifuge is spinning at 3600 rev/min, and when turned off, it rotates 50 times before coming to a stop. A) What is the initial angular velocity? B) What is the angle (in radians) that the centrifuge passes through before

asked by Mike on March 5, 2008
3. ### Physics

A centrifuge takes 100 s to spin up from rest to its final angular speed with constant angular acceleration. If a point located 8.00 cm from the axis of rotation of the centrifuge moves with a speed of 150 m/s when the centrifuge

asked by Bloom on June 24, 2012
4. ### Physics

1) A circular disk 0.20m in diameter starts from rest and accelerates with constant angular acceleration to an angular acceleration to an angular velocity of 210 rad/s in 10.00s. Find the angular acceleration and the angle which

asked by Anonymous on April 9, 2013
5. ### physics

1. A centrifuge in a medical laboratory rotates at an angular speed of 3650 rev/min. When switched off, it rotates through 50.0 revolutions before coming to rest. Find the constant angular acceleration of the centrifuge. 2. A ball

asked by Elisa on July 6, 2008
6. ### Physics

How to solve? 2. A 70.0 kg astronaut is training for accelerations that he will experience upon reentry. He is placed in a centrifuge (r = 10.0 m) and spun at a constant angular velocity of 16.3 rpm. Answer the following: a. What

asked by Josh on May 20, 2014
7. ### physics

A centrifuge in a medical laboratory rotates at an angular speed of 3800 rev/min. When switched off, it rotates through 46.0 revolutions before coming to rest. Find the constant angular acceleration of the centrifuge. in 1 rad/s2

asked by john on October 22, 2010
8. ### physics

A centrifuge in a medical laboratory rotates at an angular speed of 3,550 rev/min. When switched off, it rotates through 54.0 revolutions before coming to rest. Find the constant angular acceleration (in rad/s2) of the centrifuge.

asked by jojo on March 25, 2016
9. ### physics

A centrifuge in a medical laboratory rotates at an angular speed of 3500 rev/min. When switched off, it rotates through 54.0 revolutions before coming to rest. Find the constant angular acceleration of the centrifuge in rad/s^2.

asked by angie on November 28, 2010