Which of the following is a good conductor of electricity? a) wood
b) paper
c) iron
d) pure water

In addition to gravity, what is the other predominant force that affects the motion of a pendulum?

Which of the following forces require physical contact? tension air resistance friction magnetic force applied force

Diego kicks a soccer ball from the end line. his fellow students time and mark the soccer ball as it moves down the field. the graph represents the ball's progress. based on the graph, during what time is the velocity constant and positive?