Apologia Physical Science Middle School Module 7

A force that opposes motion, resulting from the contact of two surfaces

• Inertia

• Friction

• Kinetic Friction

• Static Friction

Friction that opposes the initiation of motion

• Inertia

• Friction

• Kinetic Friction

• Static Friction

when baseball players hit the ball hard enough , their bats can sometimes break. What is exerting force on the bat, causing it to break?

A physics student climbs a tree. To measure how high she has climbed, she drops a rock and times its fall. It takes 1.3 seconds for the rock to hit the ground. How many feet has she climbed?

A boy has placed a nickel on the outer edge of a disk. He slowly starts to spin the disk, accelerating it faster and faster until the disk and the nickel are both spinning very fast. What will happen to the nickel if the boy suddenly stops the disk without touching the nickel? Will the nickel continue to spin like it was before; will the nickel stop with the disk? or will the nickel start moving straight, skidding off the disk?

The tendency of an object to resist changes in its velocity

• Inertia

• Friction

• Kinetic Friction

• Static Friction

Which is the weakest of the fundamental forces?

State Newton's three laws of motion.

An ice cube (mass = 1.0 kg) slides down an inclined serving tray with an acceleration of 4.0 m/s2/ Ignoring friction, how much force is pulling the ice cube down the serving tray?

You are looking through a physicist's laboratory notebook and notice two numbers for friction between a block of wood and a laboratory bench. The numbers are 8N and 11N. Which refers to static friction and which refers to kinetic friction?