Question

whats two quantities do you need to include when defining a force?

a. speed and direction
b. strength and direction
c. acceleration and time
d. distance and direction

Answer 1

To define a force, we need b. strength and direction

Explanation:

In physics, there are two types of quantities:

• Scalar: scalar quantities are quantities that have only a magnitude, so basically they are just a number followed by a unit. Examples of scalar quantities in are:  time, length, speed, distance...

• Vector: vector quantities are quantities that have both a magnitude and a direction. Examples of vector quantities are:  force, displacement, velocity, acceleration...

So, this means that force is a vector quantity. Therefore, in order to fully define a force, we need two elements:

1. The magnitude of the force, also called its strength
2. The direction of the force

Therefore, the correct option is

b. strength and direction

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