1. Two challenges are being solved: (a) The docking manoeuvre of the two spacecraft is calculated;

b) The period of orbiting the Earth is calculated.

In what case can spaceships be considered as material points?

1) Only in the first case.

2) Only in the second case.

3) In both cases.

4) Neither in the first nor in the second case​

What properties of a moving object are used in determining the object's energy of motion

Find the magnetic field a distance r from the center of a long wire that has radius a and carries a uniform current per unit area j in the positive z direction.

Atank has a shape of a cone with a radius at the top of 2 m and a height of 5 m. the tank also has a 1 m spout at the top of the tank. the tank is filled with water up to a height of 2 m. find the work needed to pump all the water out the top of the spout. (use 9.8 m/s2 for g and the fact that the density of water is 1000 kg/m3.)