Science:Forces

What is force?

A push or pull

Is Force a vector quantity? Why?

Yes, because it has magnitude and direction.

Arrows are to.....

Define force and it points in the direction of the force

What is the SI unit for magnitude?

Newton (n)

What is used to measure the strength of a force?

A spring scale.

What is the definition of net force?

The combination of all of all forces acting on an object.

F1= 8n F2=6n the net force is 14 Newton

...

Two forces acting in the same direction produce a larger net force than either the original ones is....

Forces going in the same direction

Do unbalanced forces cause a change in velocity? YES? OR NO?

Yes

Do balanced forces cause a change in velocity? YES? OR NO

No

What is net force when forces on an object are balanced?

0 newtons

Two unequal forces acting in opposite directions produce a net force in the direction of the larger Force is...

Unbalanced force which shows 2 arrows pointing at ea h other.

Equal but opposing forces make cancel each other and produce no net force

Balanced force ALWAYS HAS 0 NEWTONS

What is friction?

Friction is a force that two surfaces exert on each other when they rub against each other.

The smoother the surface the less the friction.

...

Do All surfaces have friction? Why?

Yes because even if the smoothest surfaces have microscopic bumps and irregularities.

what does the strength of the force of friction depend on?

It depends on the types of surfaces involved and how hard to surfaces push together.

Is there more friction and air or water?

Water

A special type of frictional force which acts upon as they travel through air is what?

Air resistance

The force of air resistance is often observed to oppose what?

The motion of an object.

Air resistance is most noticeable for objects which travel at high speeds or...

Or for objects with large surface areas like cars and airplanes

What is compression and tension?

They are the two types of elastic forces

What is compression?

Compression is an elastic force that squeezes or pushes matter together.

What is tension?

Tension is an elastic Force that pulls matter apart.

What is tension force?

Tension force is the force which transmitted through a string, rope, cable, or wire when it is pulled tight by forces acting the from opposite ends. Tension force is directed along the length of a wire string, cable, or rope.

what is gravity?

Gravity is a force that pulls objects together.

Gravity works everywhere in the universe. True or false?

True

gravity _____ with mass and _____ with distance

increases, decreases

What is normal force and upward Force?

It is an equal and opposing Force to gravity

normal force pulls the person _______

up

gravity pulls the person _____

down

Forces going in the opposite direction, do what?

Produce a net force in the direction of the larger Force.

Balanced forces ______ cause a change in velocity

do not

unbalanced forces ________ cause a change in velocity.

do

What is used to show Force graphically?

Arrows

What is the net force when forces on an object are balanced

0 Newtons