Gravity is an attractive force that exists between all objects that have mass.
What is Gravity?
100
A force that opposes the movement between two surfaces in contact.
What is Friction?
100
A force exerted by a material when it is stretched or compressed.
What is Elastic Forces?
100
Is the amount of mass per unit volume of a material
What is Density?
200
A force that one object exerts on another when they are not touching.
What is a Noncontact Forces?
200
All objects are attracted to each other with a force that depends on the masses of the objects and the distance between them.
What is the law of universal gravitation?
200
Suppose you push a heavy box, the box doesn't move. Then then forces on the box are balanced, the force you exert on the box is balanced by a force acting on the box in the opposite direction.
What is a Static Friction?
200
A pulling force applied to an object that can make the object stretch.
What is a Tension Force?
200
Is the mass of an object divided by its volume.
What is Calculating Density?
300
A small force that exerts a push or a pull.
What is a contact force?
300
An object is the gravitational force exerted on an object.
What is the weight?
300
When the force pushing on the box is larger that the maximum static friction force, the box begins to slide.
What is a Sliding Friction?
300
A squeezing force applied to an object that can make an object shrink
What is a Compression Force?
300
To measure the density of a material or an object, you first need to measure both its mass and volume.
What is the Measuring Density?
400
Forces that combine depends on the direction of forces applied to an object.
What is a net force?
400
The size of an object's weight at the surface of earth is proportional to the object's mass.
What is the relationship between weight and mass?
400
At one time people thought that forces caused motion. A object would move only if there were unbalanced forces acting on it.
What is a Motion Without Friction?
400
A force exerted by an object that is perpendicular to the surface of the object.
What is a Normal Force?
400
Materials that can flow and have no definite shape.
What are fluids?
500
If the net force on an object is zero, an object at rest remains at rest, if object is moving it continues to move in a straight line with constant speed.
What is Newton's first law of motion?
500
How the size of the force of gravity depends on the mass of the objects ad the distance between them
What is mass and the distance of the gravity?
500
Changes of motion.
What do unbalanced forces cause?
500
Suppose if you slide a box the sliding friction force is horizontal, parallel to the floor.
How can you tell if forces are acting on an object?
500
A six-sided block in which all sides are rectangles.