Friction is directed opposite the direction of relative motion or the intended direction of motion of either of the surfaces. The force exerted by an object being pulled upon from opposite ends like a string, rope, cable, chain, etc. Tension is directed along the axis of the object.

To change the motion of an object, inertia must be overcome by an unbalanced force acting on the object. In fact, it won’t stop moving unless another unbalanced force opposes its motion. For example, Lauren can stop the rolling skateboard by moving to the other end and pushing in the opposite direction.

The large force applied to an object with a small mass will have the greatest change in motion because it would move the most since the object is very light and the force is the largest.

Every day you see moving objects come to a stop. The force that brings nearly everything to a stop is friction,which is the force that acts to resist sliding between two touch- ing surfaces, as shown in Figure 3. Friction is why you never see objects moving with constant velocity unless a net force is applied.

If you throw a ball, you are pushing on it to start its movement. If you drop an object, the force of gravity causes it to move. If an object is initially stationary, it accelerates when it starts to move. Acceleration is the change in velocity over a period of time.

Newton’s First Law of Motion An object’s velocity (a vector) does not change if and only if the net force acting on the object is zero. In other words, if there is no net force on an object, its speed and direction of motion do not change (including if it is at rest).

An object with no net forces acting on it which is initially at rest will remain at rest. If it is moving, it will continue to move in a straight line with constant velocity. Forces are “pushes” or “pulls” on the object, and forces, like velocity and acceleration are vector quantities.

The force that is “left over” after all of the forces acting on an object are cancelled and/or combined is called the net force.

Explain. yes it is possible because when the net force is zero and acceleration is zero. no, Neglecting air friction, the only force acting on this object is the force of gravity downward. There is no force of equal magnitude as the force of gravity acting in the opposite direction.

If there is more than one force acting on an object, then F is the net force. If two people pull on an object with equal forces in opposite directions, then the net force is zero and the acceleration is zero.

Answers and Replies. The constant velocity means that v ˙ = 0 , and so automatically satisfy this relation. So, we can say the zero velocity is constant velocity.

Inertia. Inertia is the property of a body to remain at rest or to remain in motion with constant velocity. Some objects have more inertia than others because the inertia of an object is equivalent to its mass.

Thus, force would cause. acceleration in horizontal motion.

An object’s resistance to change in motion is only dependent on its MASS. An unbalanced force (or non-zero net force) is needed to cause acceleration.

The tendency of an object to resist a change in velocity is known as the object’s inertia. For example, a train has significantly more inertia than a skateboard. It is much harder to change the train’s velocity than it is the skateboard’s.

Originally Answered: Does speed affect inertia? From Einstein’s relativity, yes, it does. The inertia at any given speed is given by where is the speed of light and is the inertia at rest.

Factors that affect the moment of inertia

• The density of the material.
• Shape and size of the body.
• Axis of rotation (distribution of mass relative to the axis)

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Tennis ball has least inertia.

• Inertia is the property of mass of a body.
• The object with lowest mass will have least inertia.
• The object that has greatest mass will have highest inertia, in this case car will have the highest inertia.

Answer. all bodies does not have same inertia because inertia depends on the mass of the body. For example it is easy to push or pull or stop a empty box or a book but it is not easy to push or pull or stop a car with the same force you used on the book or box.

The inertia of an object is a measure of its resistance to a change in the state of its motion. It is solely dependent on the mass of the object, with more massive objects having larger inertia and a greater tendency to resist changes to their motion.

The moment of inertia doesn’t have a direction like a vector does, but it does depend on the direction of the rotation axis.

A more massive object has more inertia than a less massive object. Fast-moving objects have more inertia than slow-moving objects. 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.

On the surface of the Earth, inertia is often masked by gravity and the effects of friction and air resistance, both of which tend to decrease the speed of moving objects (commonly to the point of rest).

Gravity exerted a greater influence than inertia on both vertical and horizontal forces generated against the ground during running.

The main difference between Inertia and Gravity is that the Inertia is a resistance of any physical object to any change in its state of motion and Gravity is a Curvature of spacetime attracting uneven distribution of masses together. Inertia is the resistance, of any physical object, to any change in its velocity.

Gravity is most accurately described by the general theory of relativity (proposed by Albert Einstein in 1915), which describes gravity not as a force, but as a consequence of masses moving along geodesic lines in a curved spacetime caused by the uneven distribution of mass.

In general relativity, gravity neither pushes nor pulls.

Earth’s gravity comes from all its mass. All its mass makes a combined gravitational pull on all the mass in your body. That’s what gives you weight. And if you were on a planet with less mass than Earth, you would weigh less than you do here.