**Answer:**

The distance traveled can be found by kinematics equations

**Explanation:**

The initial position of Car B is denoted as origin. Car A started at -16 km, and moving right. Car B started at origin and moving up. z is the magnitude of the vector with components x and y.

The relation can be found by pythagorean theorem.

For checking the solution, we can find the positions at t = 4h. Car A is at the origin, and Car B is 12 km north of origin. z = 12.

The period is given by

Squaring this gives

Plotting this period as a function of length

gives

where the slope, m, is

Wavelength is the distance between 2 crests or 2 troughs in a wave.

Period is the time taken for one wave to be completed. Frequency is the number of waves to pass a particular point in 1 second.

Period and frequency are inversely proportional

to find the speed we have to use the following equation

v = fλ

where v - speed, f - frequency and λ - wavelength

we have been given the period (T) so we have to find frequency (f)

f = 1/T

f = 1 / 20 s = 0.05 s⁻¹

v = 0.05 s⁻¹ x 200 m

v = 10 m/s

the speed of the wave is 10 m/s

A. His mass is 70 kg

b. m = 70 kg g = 10 m/s²

w = m x g = 70 x 10 = 700 N

His weight is 700 N

**1: Equilibrium**

[] When two forces are equal in opposite directions, they are in a state of equilibrium

**2: Friction**

[] It can be hard to sometimes slide a paper across a table, roll a car across the ground, etc etc. This is because of a force called friction which resists motion

**3: Displacement**

[] Work is only "done" when the object or surroundings are having movement, or in motion, and this creates displacement

**4: Force**

[] A force is a push/pull in any direction, this is a simple definition so not much can be added.

**5: Inertia**

[] Inertia is a force that likes to remain unchanged, or without movement

**6: Effort**

[] "Meg is holding up weight without movement. She hasn't done any work since it did not move, but is tired. Why?" Effort! She still put in effort even though no "work" happened

**7: Work**

[] Force times displacement is the equation for work

**8: Motion**

[] Look back to #3, when there is motion we can tell work is done

Have a nice day!

I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly. (ノ^∇^)

- Heather