Tom pushes a 10 kg wood box across a wood floor at a steady speed of 1 m/s. There is friction between the box and the floor. Tom app lies a force of 200 N to maintain the motion of the box. Now, if the box becomes four times heavier, and it is moving at a steady soeed of 2 m/s, how much force (in New on) does Tom need to apply to maintain the motion of the box?
Stellar evolution
We may see thousands of stars in the dark sky. Our universe consists of billions of stars. Stars may appear tiny to us but they are huge balls of gasses. Sun is a star of average size. Some stars are even a thousand times larger than the sun. The stars do not exist forever they have a certain lifetime. The life span of the sun is about 10 billion years. The star undergoes various changes during its lifetime, this process is called stellar evolution. The structure of the sun-like star is shown below.
Red Shift
It is an astronomical phenomenon. In this phenomenon, increase in wavelength with corresponding decrease in photon energy and frequency of radiation of light. It is the displacement of spectrum of any kind of astronomical object to the longer wavelengths (red) side.
How do I incorporate the velocities given to find the Force?
Trending now
This is a popular solution!
Step by step
Solved in 4 steps with 2 images
