When falling from a high building it is advisable to roll as you contact the ground.  Compared to contacting the ground and not rolling (assuming you fall from the same height), the purpose of this action is to:Question 22Select one:a.apply a smaller impulse to your body to change its momentum by decreasing the force appliedb.apply a larger impulse to your body to change its momentum by increasing the time over which the force is appliedc.apply the same impulse to your body to change its momentum by increasing the time over which the force is experienced and thereby decreasing the forced.apply a smaller impulse to your body to change its momentum by increasing the time over which the force is experiencede.apply the same impulse to your body to change its momentum by decreasing the time over which the force is experienced and thereby increasing the force

If you start to fall, you should do all of the following EXCEPT:Toss the load.Relax as much as possible.Try to roll into the fall, turning quickly to spot where you will hit the ground.Extend your arms out with locked elbows.

Gravity can make a ball roll downhill without touching it. Kicking a ball can make it roll by touching it with a foot.To make something that is sitting still start moving, there always needs to be _______ on the object. A. light B. force C. heat D. contact

Consider what happens when you jump up in the air. Which of the following is the most accurate statement?Group of answer choicesIt is the upward force exerted by the ground that pushes you up, but this force cannot exceed your weight.Since the ground is stationary, it cannot exert the upward force necessary to propel you into the air. Instead, it is the internal forces of your muscles acting on your body itself that propels your body into the air.When you push down on the earth with a force greater than your weight, the earth will push back with the same magnitude force and thus propel you into the air.When you jump up the earth exerts a force F1 on you and you exert a force F2 on the earth. You go up because F1 > F2.You are able to spring up because the earth exerts a force upward on you that is greater than the downward force you exert on the earth.

If you are falling, which scenario will cause the greatest change in momentum when you land?Long time intervalShort time intervalMore information is needed Your change in momentum is the same no matter whatSmall force

Let us first guess the answer based on our commonexperience. To move a football at rest, someone must kick it.To throw a stone upwards, one has to give it an upwardpush. A breeze causes the branches of a tree to swing; astrong wind can even move heavy objects. A boat moves in aflowing river without anyone rowing it. Clearly, some externalagency is needed to provide force to move a body from rest.Likewise, an external force is needed also to retard or stopmotion. You can stop a ball rolling down an inclined plane byapplying a force against the direction of its motion.In these examples, the external agency of force (hands,wind, stream, etc) is in contact with the object. This is notalways necessary. A stone released from the top of a buildingaccelerates downward due to the gravitational pull of theearth. A bar magnet can attract an iron nail from a distance.This shows that external agencies (e.g. gravitational andmagnetic forces ) can exert force on a body even from adistance