技术和虚拟群众对执法部门的影响 - - 特定的身体拖动:测试和培训的影响
Matthew R Moreno1, J Jay Dawes2,3, Robin M Orr4
1Human Performance, Marine Corps Community Services, Camp Pendleton, CA, USA.
International journal of exercise science
|September 9, 2024
概括
执法机构使用较轻的玩具进行拖拉测试,可能无法反映现实世界的需求. 更重的人形和适应的技术显示出了显著的差异,突出了力量训练的必要性,以为新兵准备实际现场条件.
科学领域:
- 法医科学 法医科学 法医科学
- 人类表现的人类表现.
- 职业安全 在职业安全.
背景情况:
- 当前的执法实体评估可能无法准确地反映现实世界的场景需求.
- 在体力拖拉试验中使用的模拟质量可能与当前人口平均值相比体重不足.
研究的目的:
- 为了研究使用74.84公斤和90.72公斤的人形的身体阻力时间的差异.
- 为了比较标准,适应和首选的身体拖拉技术.
- 为了为执法人员的新兵提供物理评估协议的信息.
主要方法:
- 43名健康的平民用74.84公斤和90.72公斤的玩偶进行了9.75米的身体拖动.
- 评估了三种技术:标准 (提升和站立),适应 (包括提升到站立) 和首选 (任何技术).
- 分析使用了2 (质量) ×3 (技术) 的因子内ANOVA.
主要成果:
- 参与者拖拉较轻的玩具 (74.84公斤) 的速度明显快于较重的玩具 (90.72公斤).
- 标准拖动技术完成的速度比适应和首选技术要快.
- 适应的阻力比首选的阻力更快,但包括起重部件.
结论:
- 较重的模拟物质显著增加了身体的拖动时间,这表明新兵需要拥有更大的力量.
- 建议在警察学院期间进行特定活动的力量训练,以提高现场准备.
- 调整后的技术提供了更全面的评估,包括提升阶段,可能会影响未来的测试协议.
相关概念视频
Force and Momentum
15.4K
Force and momentum are intimately related. Force acting over time can change momentum, and Newton's second law of motion can be stated in its most broadly applicable form in terms of momentum. Momentum can be applied to systems where the mass is changing, such as rockets, as well as to systems of constant mass. Also, momentum continues to be a key concept in the study of atomic and subatomic particles in quantum mechanics. One can consider systems with varying mass in some detail; however,...
15.4K
Drag Force and Terminal Speed
2.3K
An interesting force in everyday life is the force of drag on an object when it is moving in a fluid. Like friction, the drag force always opposes the motion of an object. Unlike simple friction, the drag force is proportional to some function of the velocity of the object in that fluid. This functionality is complicated and depends upon the shape of the object, its size, its velocity, and the fluid it is in. For most large objects, such as cyclists, cars, and baseballs, that are not moving too...
2.3K
Second Law: Motion under Same Acceleration
5.7K
Newton's second law of motion applies to bodies moving under the same acceleration. For example, when a baggage tractor pulls luggage carts, each cart moves at the same acceleration as that of the tractor.
5.7K
Second Law: Motion under Same Force
5.3K
Newton's laws can be applied to bodies at rest and bodies in motion. Newton's first law is applied to bodies in equilibrium, whereas the second law applies to accelerating bodies. To study accelerating bodies, first, the directions and magnitudes of acceleration and the applied forces are determined. Then, the free-body diagram is constructed, and Newton's second law is applied, considering the components of the forces in the x and y directions.
Let's imagine a person is...
Let's imagine a person is...
5.3K
Weightlessness
5.0K
When an object is dropped, it accelerates toward the center of the Earth. If the net external force on the object is its weight, it is said to be in free fall; that is, the only force acting on the object is gravity. Galileo was instrumental in showing that, in the absence of air resistance, all objects fall with the same acceleration g. However, when objects on the Earth fall downward, they are never truly in free fall, because there is always some upward resistance force from the air acting...
5.0K
First Law: Particles in Two-dimensional Equilibrium
5.0K
Recall that a particle in equilibrium is one for which the external forces are balanced. Static equilibrium involves objects at rest, and dynamic equilibrium involves objects in motion without acceleration; but it is important to remember that these conditions are relative. For instance, an object may be at rest when viewed from one frame of reference, but that same object would appear to be in motion when viewed by someone moving at a constant velocity.
Newton's first law tells us about...
Newton's first law tells us about...
5.0K


