Physical Science 2nd Quarter Final

What is the most direct method for calculating the IMA of an inclined plane?

Explain the main function of a parachute from a physics point of view?

Give the most complete statement of the first law of thermodynamics.

Applies to all lever systems but only when the lever system is in rota­ tional equilibrium.

A modified form of wheel and axle is a(n)

What does the W in the work formula represent?

All physicists agree that there are nine forms of energy.

Occurs when a force acts on an object to move it in a direc­ tion parallel to the force vector.

A field force can produce a mechanical force in a system.

Why is the IMA of a second class of lever always greater than 1?

Why does the dinner plate not move?

Name one natural source of electrical energy.

A slingshot stretched and about to be fired has which type of energy?

One important purpose of gears is to change the direction of rotary motion.

When a log burns on a campfire, what is the energy source for the combustion?

Give an example of shear force.

Give an example of compression.

Physics has explained the why and how of all natural forces.

Identify the external forces acting on a dinner plate resting on a table.

What does the F in the work formula represent?

To use the distance formula d= 1/2 a X (Δt)², what assumption must you make?

Gravity is the strongest of the four fundamental forces.

How do you illustrate force in a diagram?

Work is done on an object to increase its kinetic or potential energy.

Acoustic energy is transferred through small, random, repeated particle displacements.

Does a flying bird have potential energy?

Simple machines must have mechanical advantages greater than 1 to be useful.

What quantity is the measure of inertia?

Unlike other wheel­axle systems, pulleys and pulley systems always have an IMA of 1 or more.

What form of energy can move through the vaccum of space without needing matter?

How does distance between the centers of two objects affect gravitational force between them?

How does a balanced seesaw relate to Newton’s laws of motion?

Compare potential and kinetic energy.

In the most efficient energy transformations, more useful energy is produced than was put in.

The rate of doing work is

Is energy something that an object has or something that it does?

Why were magnets considered to be magical in ancient time?

Under what condition of motion is friction between two objects that are touching greatest

Do all force fields visibly affect all matter?

Which contact force cannot produce potential energy?

Give an example of torision.

Give an example of tension force.

What is the SI unit of force?

A thicker wedge takes more effort to use than a thinner one.

Under what condition does gravity do no work on a moving object?

What is force?

What are the four mechanical (contact) forces?

Under what condition would the IMA of a wheel­axle system be greater than 1?

Does a stationary car have kinetic energy?

Friction is proportional to the surface area of contact between two objects.

What is the everyday source of electrical energy?

Why did Galileo roll balls down a ramp rather than dropping them as he investigated inertia?

What does the d in the work formula represent?

A falling snowflake can have both kinetic and potential ener­gies at the same time.

What conditions must exist for an object to have mechanical potential energy?

What is work as a physicist would define the term?

On the basis of the power formula, what change in condition can increase the amount of power?

How is a gear system’s IMA determined?

The best jackscrew to use for lifting a house off its foundation is one with a large pitch

What is the tendency for matter to continue in its current state of motion?

In the real world, how will the AMA of a pulley (or any simple machine) compare to its IMA?

What's is the formula for mechanical work?

The most common source of fusion nuclear energy is found in man­made fusion bombs.

Why are there no perfectly elastic collisions?

What kind of equilibrium exists when a lever system is bal­anced?

In lever systems, the IMA is found by length of the resistance arm ÷ length of the effort arm.

Chemical energy is a form of potential energy bound up in the bonds between atoms.

The energy of an object is one of its properties.

Thermal energy is a form of kinetic energy at the particle level.

If you exert 20 N of force on a lump of bread dough while kneading it, what else must be true?