Chapter 5 - Dynamics: Why Things Move

In addition to magnets, a moving electric charge can also be a source of a magnetic field.

gravitational force, is the strongest of the fundamental forces.

contact forces do not change with distance.

Forces are vectors because they cause objects to accelerate in proportion to their magnitude.

Newton developed the equations describing why celestial bodies move the way that they do.

The forces acting on a system are balanced if and only if there is no acceleration.

Which object has the most inertia? a peregrine falcon, Mount Everest, or

When no outside forces act on a moving object, it will eventually stop moving.

The magnitude of a force is a scalar quantity.

The words: compression, tension, torsion & shear are examples of

What is an example of result of a contact force?

The electromagnetic force holds the nuclei of atoms together.

Contact forces cause all observed changes in motion.

An external force is exerted from outside a system’s boundaries.

Which two ever present forces affect all motion on Earth?

Balanced forces cause an object, if it is in motion, to maintain its motion.

Modern physics concerns all of the following except …

gravity, friction, and tension are examples of....

Equal forces on the same object in the opposite direction are balanced.

Magnets are the sole source of magnetic fields.

A force is a(n) ____or a(n) ____ on a system.

Even an object quite distant from the sun cannot be free from the sun’s gravitational pull.

Galileo developed equations governing how forces act.

Newton’s first law describes motion when no net forces are exerted.

The first person to write about the causes of motion was

______ forces cause an object, if it is in motion, to maintain its motion

A wrecking ball strikes a brick wall. Which would increase the force of the ball?

Newton’s first law states: only external forces acting on an object can cause it to accelerate.

The forces acting on a system are balanced if and only if there is no...

Who was the first person to write about the causes of motion?

Newton developed the equations describing how celestial bodies move the way that they do

The electromagnetic force is both an attractive and a repulsive force between electric charges.

The electromagnetic force is both an attractive and a repulsive force between electric charges.

Newton’s law of inertia applies only to moving objects.

In addition to magnets, a moving electric charge can also be a source of a magnetic field.

____ cause objects to accelerate in proportion to their magnitude.

Tendency of matter to resist a change in motion until acted on by an external force is known as

Scientist who used Galileo's ideas to formulate laws was

The SI unit of force is the

Whose experiment enabled scientists after him to calculate gravitational force between masses?