The first human made object made to orbit earth was the Soviet Union's Sputnik 1, it launched the 4th of October 1957.
W, because as time is moving up at a consistent rate the speed is as well, creating the straight line.
Technically yes you are i think
Hi!
The energy of the block is 4 m/s
To calculate this, you need to use the equation for
kinetic energy. The block is sliding (i.e. it's moving). If the object is sliding across a level surface, the only energy it has is kinetic energy, because
there is no change in potential energy (which changes with height). So, the mechanical energy will be pure kinetic energy. The equation is the following, derived from the expression for kinetic energy:

Have a nice day!