Is it more difficult to start a body moving or to keep it moving?

Once in motion it is easier to keep it in motion than it was to get it started, indicating that the kinetic friction force is less than the static friction force. If you add mass to the crate, say by placing a box on top of it, you need to push even harder to get it started and also to keep it moving.

Why is it easier to start motion in a lighter body than a heavier body?

It is simple. The rule is that a lighter object is easier to accelerate than a heavier object if you apply the same force to each object. If you push as hard as you can on a car, it may move a little and very slowly.

Why does it take more force to start an object moving than to keep it moving?

Things continue doing what they are doing unless a force is applied to it. Objects have a natural tendency to resist change. This is INERTIA. Heavier objects (objects with more mass) are more difficult to move and stop.

Why it’s more difficult to start moving a heavy carton from rest than it is to keep pushing it with constant velocity?

It’s more difficult to start moving a heavy carton from rest than it is to keep pushing it with constant velocity, because the normal force is greater when the carton is at rest.

What is necessary to start the motion?

The value of static friction varies between zero and the smallest force needed to start motion. This smallest force required to start motion, or to overcome static friction, is always greater than the force required to continue the motion, or to overcome kinetic friction.

Would an object have inertia in a gravity free environment?

Inertia is a force. Inertia is a force which keeps stationary objects at rest and moving objects in motion at constant velocity. An object would not have any inertia in a gravity-free environment (if there is such a place). Inertia is the tendency of all objects to resist motion and ultimately stop.

Why do you think some objects move faster than the others?

Galileo discovered that objects that are more dense, or have more mass, fall at a faster rate than less dense objects, due to this air resistance. A feather and brick dropped together. Air resistance causes the feather to fall more slowly.

How can the motion of objects be explained by Newton’s law of motion?

What are Newton’s laws of motion? Newton’s laws of motion relate an object’s motion to the forces acting on it. In the first law, an object will not change its motion unless a force acts on it. In the second law, the force on an object is equal to its mass times its acceleration.

Why is studying friction useful?

The study of static friction is also a useful supplement to the dynamic testing of brake friction materials. In such a study, precise control of the temperature on the surfaces is possible, as well as surface roughness, and existence of the third-body can be accurately identified.

What force keeps you from sliding on an icy sidewalk?

What Is Friction? Friction is a force that opposes motion between any surfaces that are touching. Friction can work for or against us. ting sand on an icy sidewalk increases friction so you are less likely to slip.