5. George walks to a friend's house. He walks 750 meters North, then realizes he walked too far. He

turns around and walks 250 meters South. The entire walk takes him 13 seconds. What is his speed

per second?

A hollow sphere of radius 0.15 m, with rotational inertia I 0.040 kg m2 about a line through its center of mass, rolls without slipping up a surface inclined at 30 to the horizontal.

What effect does solar wind have on mercury Venus and mars

You are riding in an enclosed train car moving at 90 km/h. If you throw a baseball straight up, where will the baseball land? a. In front of you. b. In your hand. c. Behind you. d. Can't decide from the given information.

A racecar is equipped with a computer that records the reading on its speedometer every second during a race. If you graph this data, what will be the best choice for the dependent variable?

Suppose a log log's mass is 5kg. Aftee burning, the mass of the ash is 1kg. Explain what may have happened to the other 4kg?

Describe and apply Newton's Three Laws

If you do 1000j of work on a system and remove 500j of heat from it, what is the change in its internal energy

Two children stretch a jump rope between them and send wave pulses back and forth on it. The rope is 4.5 m long, its mass is 0.42 kg, and the force exerted on it by the children is 71 N.

An object will only change its motion if a force is directly applied to it. is this a true statement?

Janice has just measured the density of an object. Which value is possible? (Density: D = )