Science-8: Force and Pressure (Chapter 6)

Fill-in-the-blank flashcards covering muscular force, drag, gravity, electrostatic and magnetic forces, contact and friction, and pressure concepts from the notes.

Muscular force can __ gravity.

overcome

The resistive force exerted by a fluid on an object moving in it is called __.

drag

Drag increases with area of the moving object and its __.

speed

The weight of an object is determined by the force of __ acting on it.

gravity

A person will weigh more on the __ than on the moon.

Earth

The weight of an object can be measured using a __ balance.

spring

If you hold a brick at an arm's length, your arm muscles are fighting __.

gravity

As long as the muscular force can __ gravity, you will be able to hold the brick.

overcome

Electrostatic force is the force exerted by a __ body on other charged or uncharged bodies.

charged

Comb acquires electric __.

charge

The force of attraction between a magnet and magnetic materials, like iron and nickel, is called __ force.

magnetic

II. Contact forces: These forces come into play only when bodies are in __ with each other.

contact

Frictional force: The force that acts on objects in contact and in the direction __ to motion.

opposite

The force applied by the muscles of the body is called __ force.

muscular

Friction always __ the motion of an object.

opposes

Pressure can be defined as the force acting per __ area.

unit

Pressure is more if the area on which it acts is __.

less

The same person creates different impressions on the ground in flat sandals and __ heels.

narrow

Observations on the bed experiment show that standing on the bed presses down more because weight acts on a __ area.

smaller