Mechanics | Relativity Answers

A space crafter shaped like a hoop with a radius of 100m is revolving at 3 RPM. It’s rotational inertia is 8.8 * 105 kgm2. It then extends out a set of solar panels from all sides effectively moving 20kg from a radius of 100m to 120m. After deploying, what will be the rotational speed of the station?

Two bowling balls collide. A red 5 kg bowling ball is traveling with a velocity of 1 m/s to the left. A blue 4 kg bowling ball is traveling with a velocity of 2 m/s to the right. The 5 kg ball moves 0.8 m/s to the right after the collision. What is the final velocity of the 4kg ball?

you hear a mosquito flying while you are doing your exam , is it in motion?

An object of mass 3kg rests on a plane. The coefficient of static fraction and that of static fraction given by mass 0.3 and Mr =0.2. The plane inclined at an angle theta at the horizontal. (a) Find the maximum value of the theta for which the object remains at rest. (b) find the acceleration of the object of it started sliding from rest down the plane at the angle theta maximum to horizontal. (c) How long does it take the object to move from rest, a distance of 1m under the condition of B?

You and your friend decide to get into your cars and begin to race. From previous experience, you know that your friend’s car has an acceleration of 3.25 m/s2 and your car has an acceleration of 4.15 m/s2, so you decide to wait to start 3.0 s after your friend leaves the starting line. a) How long does it take for you to catch up to your friend? b) how fast are you and your friend going at the time you catch up to them. c) How far did you need to travel before you caught up with your friend?

https://isaacphysics.org/questions/towel_washing_line_num

I asked a question that sound of firecracker burst in one direction comes from a different direction you told it's reason as reflection of sound
But if it was reflection of sound then why doesn't that sound echo as reflection of sound causes echoes
The sound from different direction is heard as if it was coming from that direction only

A flat sheet is in shape of a rectangle with sides of length 0.400m and 0.600m. The sheet is immersed in a uniform electric field of magnitude 75.0n/c that is directed at 20°.from the plane sheet calculate the magnitude of the electric flux through the sheet

The lattitude of lubbock texas (known as the hub city of the south plains)is 33N. What is its rotational speed, assuming that the radius of earth at the equator to be 63km?

The acceleration due to gravity on Earth is about 10 m/s^2. Find the acceleration due to gravity on the moon. (MMoon=7.35*10^22kg, RMoon = 1.74*10^6m).