What is Force?

Compare and contrast balanced and unbalanced forces.

Both refer to forces that are acting on an object. Balanced forces are two opposing forces pushing or pulling with the same strength on the same object, making the net force zero. Unbalanced forces are opposing forces pushing or pulling on the same object with differing strengths, making the net force, more than zero.

Examples of forces include friction, gravity, and velocity.

False

The length of a force arrow represents the direction of the force.

False

Equal but opposite forces pushing on the same object produce a net force of zero on the object.

True

Force can cause a moving object to stop moving.

True

Write true if the statement is true or false if the statement is false. The force of gravity acting on an object is measured by weight.

True

Identify the forces acting on you when you are standing still. Explain why the forces do not cause you to move.

Two examples of forces acting on you when you are standing still are: gravity which is pulling you to the center of the earth and the ground you're standing on is pushing you up (upward force). Since they are both opposite forces and both have the same strength, the system of forces is balanced. When a pair of forces is balanced, these forces don't cause you to move.

The force that a person or thing exerts on an object is called ______ force.

applied

Any push or pull acting on an object is a(n) _______.

force

The combination of all the forces acting on an object is known as the _____ force.

net

The SI unit for force is the _________.

newton (N)

When opposing forces are not equal in strength, the forces are said to be ________.

unbalanced

Why is force a vector? a. It causes objects to move. b. It has size and direction. c. It can be measured. d. two of the above

ⓑ It has size and direction

One newton is defined as the amount of force that causes: a. a weight of 1 pound to reach a speed of 1 m/s. b. a mass of 1 kilogram to accelerate at 1 m/s2. c. an object to increase its velocity to 1 m/s2. d. any stationary object to start moving.

ⓑ a mass of 1 kilogram to accelerate at 1 m/s2

How much an object's motion changes when force is applied to it depends on the strength of the force and the object's: a. size. b. mass. c. volume. d. velocity.

ⓑ mass

What is the net force acting on the object pictured below? a. 7 N to the right b. 7 N to the left c. 2 N to the right d. 3 N to the left

ⓓ 3 N to the left

If two forces act on an object in the same direction: a. the net force is greater than either of the two forces. b. the net force equals the sum of the two forces. c. the two forces are always balanced. d. two of the above

ⓓ the net force equals the sum of the two forces.