Question

SOMEONE HELP PLEASE!!!!(15POINTS)

Answer 1

Answer: Friction

Explanation:

Friction is a force that opposes the motion of an object on another surface. For example, when a box is pushed along the floor, the floor exerts a frictional force on the box, "resisting" the motion of the box. This force is due to the contact between the molecules of the box and the molecules of the floor, and it is always directed against the direction of motion of the object (so, if the object is moving forward, friction acts backwards).

The magnitude of the friction force is given by:

$F=\mu N$

where $\mu$ is the coefficient friction, which is a number that depends on the materials of the two surfaces, and N is the normal reaction.

Answer 2

The force that always acts opposite to the direction of motion of the body is the friction.

Further Explanation:

The force applied on a body is a pull or push which makes a body to change its state of rest or motion. When a body moves on a surface under the action of a force, the body accelerates along the floor.

If the body is moving on a rough floor, then there will be a friction force between the surface and the body and this friction force tends to oppose the motion of the body. The friction force is always acting in the direction opposite to the motion of the body.

The normal force is a force which acts as a reaction force of the surface acting on the body due to the action of the force exerted by the body on the surface. The friction force is always perpendicular to the surface on which the body is placed and therefore, it is termed as the normal force.

The weight of a body is the force by which the body is attracted towards the Earth by the gravitational force of the Earth. The weight of the body is always directed towards the center of the Earth.

Thus, the force that always acts opposite to the direction of motion of the body is the friction.

Learn More:

1. A 50-kg meteorite moving at 1000 m/s strikes earth. Assume the velocity is along the line brainly.com/question/6536722

2. With your hand parallel to the floor and your palm upright, you lower a 3-kg book downward brainly.com/question/9719731

3. A 30.0-kg box is being pulled across a carpeted floor by a horizontal force of 230 n brainly.com/question/7031524

Answer Details:  

Grade: Middle School

Subject: Physics

Chapter: Newton’s law of Motion

Keywords:

Force, opposite to, direction of motion, car, moving forward, force would act, in backward direction, applied, friction, oppose the motion, weight, normal.