Is air affected by human movement?

Air has mass, but not inertia. C. Air is not affected by human movement.

What is the best to say about a runner who is running at a constant velocity?

What is BEST to say about a runner who is running at a constant velocity? Their acceleration is zero.

Is air a source of resistance?

By definition, air resistance describes the forces that are in opposition to the relative motion of an object as it passes through the air. … Another way to put it would be to say that air resistance is the result of collisions of the object’s leading surface with air molecules.

When an object has its motion changed the cause is generally?

A force is a push or pull that can cause an object to move, stop, or change speed or direction. 3. The greater the force, the greater the change in motion.

Are real world efficiencies generally high?

Real-world efficiencies are generally very high, in the 90 percent range.

What is the most common lever in the human body?

Third-Class Levers
Third-Class Levers

The third-class lever is the most common type of lever in the human body. With this class of lever, the force applied is in the middle, between the resistance and the axis of rotation (R-F-A). In this lever arrangement, the resistance arm is always longer than the force arm.

Which object will have the most momentum?

more massive object
Two objects of different mass are moving at the same speed; the more massive object will have the greatest momentum. A less massive object can never have more momentum than a more massive object.

When the force of an object increases so does it?

From Newton’s second law the force on an object is related to the acceleration. The acceleration is directly proportional to the force applied to an object. For an object whose mass remains constant, when the force increases the acceleration increases. When the force on an object increases, so does its acceleration.

Is gravity an attractive force that decreases as the mass of an object increases?

Gravity is an attractive force that decreases as the mass of an object increases.

How do you find the greater momentum?

Momentum is directly proportional to the object’s mass and also its velocity. Thus the greater an object’s mass or the greater its velocity, the greater its momentum.

What options are true about momentum?

Momentum is calculated as the product of mass and velocity. As the speed of an object increases, so does its velocity. For the same speed (and thus velocity), a more massive object has a greater product of mass and velocity; it therefore has more momentum.

Which change in mass and velocity would increase the momentum of an object by the greatest amount?

A moving object can have a large momentum if it has a large mass, a high speed, or both. It is harder to stop a large truck than a small car when both are moving at the same speed. … The greater the force acting on an object, the greater its change in velocity and the greater its change in momentum.

Which undergoes the greatest change in momentum?

The momentum change is dependent upon the velocity change; the object with the greatest velocity change has the greatest momentum change.

What are the two factors does momentum depend on?

Momentum depends upon the variables mass and velocity. In terms of an equation, the momentum of an object is equal to the mass of the object times the velocity of the object.

How do you find momentum after a collision?

Since the two colliding objects travel together in the same direction after the collision, the total momentum is simply the total mass of the objects multiplied by their velocity.

Would you care to fire a gun that has a bullet 10 times as massive as the gun?

Would you care to fire a gun that has a bullet 10 times as massive as the gun? No. The gun would recoil with a speed ten times the muzzle velocity.

Why is a force that is applied for a short time more advantageous in karate?

In karate, why is a short time for the applied force advantageous? The shorter time is accompanied by a greater force when the momentum of the arm is reduced. … Stopping and then reversing direction is a greater change in momentum and therefore requires a greater impulse.

Which has the greatest impulse quizlet?

Balloon B has the greatest impulse. Impulse is equal to momentum change.

Why do gymnasts use floor mats that are very thick?

Why do gymnasts use floor mats that are very thick? Because the cushion in the mat extends the time and lessens the force. … the steel cord will stretch only a little, resulting in a short time of stop and a corresponding large force.

Why are the impulses that colliding objects?

The impulses that colliding objects exert on each other are equal and opposite because the time for which they interact are equal for both the objects. According to Newton’s 3 rd Law of Motion, forces are equal and opposite, so impulses that colliding objects exert on each other are equal and opposite.

Why do mountain climbers prefer nylon ropes?

Nylon ropes, which stretch considerably under tension, are favored by mountain climbers because they stretch and take time in coming to a stop when mountain climbers accidentally fall.