If we say that one object is under free fall motion what do we mean in physics

It is theorized that protons and neutrons are actually formed from a combination of smaller particles. what are these particles called?

Explain why a parachute would be useless if you went to the Moon?

What new technologies are used in determining the speed of light?

What force acts on a projectile in the horizontal direction?

How can you explain thermal expansion in terms of kinetic energy?

Two books with different masses fall off the same bookshelf. As they fall, which has more kinetic energy and why

Which of the following is an example of convection? a a hot object transferring heat to a cooler one b the rays of the Sun warming the earth c a hot oven warming the air around it d hot air rising and cooler air falling

Bob drove from home to work at 60 mph. after work the traffic was? heavier, and he drove home at 50 mph. his driving time to and from work was 1 hour and 28 minutes. how far does he live from his? job?

How to measure voltage across an ungrounded component with a two channel oscilloscope?

In deep space there is very little friction once they are launched into a probe into deep space where there are no external forces acting on it scientists shut the probe's engines off because the scientists want the probe to