TRUE or False questions

1.

The astronauts voyaging to the Moon had difficulty describing their speed since they had two speeds, one relative to the Earth and one relative to the Moon.

2.

During a space rocket launch the velocity is measured relative to the launch pad, but later it is measured relative to the center of the Earth since the launch pad is moving as the Earth spins.

3.

it is easier to measure change in velocity than constant velocity.