Question

1. which scenario best demonstrates an example of a force that acts at a distance? a. a cyclist pedaling on a flat surface b. pencil falling off a table c. a ball bouncing down a flight of stairs d. a snowball rolling down a mountainside 6. which event is caused by a contact force? a. a rock on a hillside falls into the valley b. lightning strikes a tree, causing it to split into two parts. c. an earthquake causes a building far away to shake. d. two parts of a magnetic switch come together, allowing an electric current to flow. 7. jupiter is many times farther from the sun than the earth. why is the gravitational force between the sun and jupiter much stronger than the gravitational force between the sun and the earth? a. jupiter is farther from the sun than the earth, and gravitational force increases with increased distance. b. jupiter has much more mass than earth, and gravitational force increases with increasing mass. c. jupiter has much more volume than earth, and gravitational force increases with increasing volume. d. jupiter moves much faster around the sun than the earth, and gravitational force increases with increasing speed. 8. two students are pushing a heavy metal box across a piece of plywood. which is not a way that the students can reduce the friction on the box as it moves? a. take objects out of the box to make it lighter. b. pull the box from the opposite side instead of pushing it. c. push the box across a smoother surface. d. spread a lubricant across the surface of the wood.

Explanation:

Answer:

(5) b. pencil falling off a table
(6) d. Two parts of a magnetic switch come together, allowing an electric current to flow.
(7) b. Jupiter has much more mass than Earth, and gravitational force increases with increasing mass.
(8) b. Pull the box from the opposite side instead of pushing it.