ASVAB Physics Flashcards

Mass = the amount of matter that something has.
Weight = the force exerted on an object's mass by gravity.

The rate at which an object changes positions. V=distance/time. Vector quantity = described my magnitude and direction.

The tendency of an object to continue moving in the same direction. Momentum=mass x velocity.

Rate change of velocity. acceleration = change in velocity/change in time.

Push or pull that forces an object to change its speed or direction. Ex: Weight. Unit of force = newton.

the force exerted on an object times the distance moved in the direction of the force. work = force x distance. unit of work = newton-meter OR joule.

The rate at which work is performed. Power = work/time. Power = (force x distance)/time. Unit of power = joule per second or watt.

An object at rest stays at rest, and an object in motion stays in motion, unless acted upon by an outside force. ex: friction, gravity.

Net force = mass x acceleration
law of inertia.
the greater the mass of an object, the greater the force needed to overcome its inertia.

For every action, there is an equal and opposite reaction.

Gravity
1. the force exerted on the Earth by the Sun is equal and opposite to the force exerted on the Sun by the Earth.
2. If the mass of the Earth were doubled, the force on the Earth would double.
3. If the mass of the Sun were doubled, the force of the Earth would double.
4. If the Earth were twice as far away from the Sun, the force on the Earth would be a factor of four smaller.

the capacity to do work
kinetic - moving object & potential - energy stored in an object based on position, shape, state

Energy can neither be created nor destroyed. Changes from one form to another form.

Produced when an object vibrates. Can travel through air, liquids, solids, but not a vacuum or empty space. High frequency = high pitch.

Occurs when either the source of the sound waves, the listener, or both, are moving.