Apply a force of 50 n right to the box. describe the motion of the box using physics terms (i. e. velocity, acceleration, displacement). refer to the speedometer in your answer.

The motion will be of constant acceleration, uniformly increasing velocity and displacement will be a quadratic function of time.

The force applied here is from the one side of the object that's why it is known as the unbalanced force and unbalanced force causes acceleration in the system. Due to that acceleration body start accelerating resulting in a change in the velocity of the system as the velocity changes result in the displacement of the system.

Newton's second law of motion easily describes the relationship between displacement, velocity, and acceleration.

The motion will be of constant acceleration, uniformly increasing velocity and displacement will be a quadratic function of time.

To know more about newtons law of motion refer to:

link

When unbalanced force is acting on the system of mass then as per Newton's II law we can say

here we have

now since the force and mass both given to us so we can find acceleration of object from this

now when 50 N force is applied on a box then this 50 N force is unbalanced force on it and it will produce acceleration to the box

So here we can say that box will accelerate with constant acceleration and hence its velocity will linearly increase with time.

Now the displacement of the object will be given as

so here the displacement will be a quadratic function of time and increases with time as well

so here overall the motion will be of constant acceleration, uniformly  increasing velocity and displacement will be a quadratic function of time

its c i just checked it

the answer is c. the lower legs are levers, and the knees are fulcrums. the ankles hold the loads.