Question

What can you say about the velocity of a moving body that is in dynamic equilibrium? Draw a sketch of such a body using clearly labeled arrows to represent all external forces on the body.

a) Velocity is constant; sketch shows balanced forces.
b) Velocity changes; sketch shows unbalanced forces.
c) Velocity is constant; sketch shows unbalanced forces.
d) Velocity changes; sketch shows balanced forces.

Answer 1

When a moving body is in dynamic equilibrium, its velocity is constant. A sketch of such a body would show balanced forces. Example: a car moving at a constant speed.

Step-by-step explanation:

When a moving body is in dynamic equilibrium, its velocity is constant. A sketch of such a body would show balanced forces, with equal and opposite arrows representing the external forces acting on the body.

For example, let's consider a car moving at a constant speed on a horizontal road. The forces acting on the car include the force of gravity pulling it down, the normal force exerted by the road, and the force of friction opposing its motion. If these forces are balanced, the car will continue to move at a constant velocity.