Which of the following is an example of static friction? a. rubbing sticks together to create a fireb. a marble rolling down a streetc. leaning against a rock to take a break. d. a hockey player shooting a puck into the goal.

Read through the scenarios below and calculate the predicted change in kinetic energy of the object compared to a 100 kg ball traveling at 5 m/s. a 1,000 kg ball traveling at 5 m/s would have kinetic energy. a 10 kg ball traveling at 5 m/s would have kinetic energy. a 100 kg person falling at 5 m/s would have kinetic energy. the choices for all: the same 10 times more 10 times less 100 times more 100 times less