When the only external force acting is gravity there is a direct correlation between:

Question

BlackTom AI · Accepted Answer

The question asks about the relationships that hold when the only external force is gravity. 
Option a: 'Kinetic and potential energy' – This is the core idea of mechanical energy conservation under gravity. In a system with only conservative gravity, total mechanical energy (kinetic plus potential) remains constant, and energy continuously exchanges between KE and PE as the object moves. This creates a direct, clean correlation: as one form increases, the other decreases correspondingly, keeping the sum constant. 
Option b: 'Potential energy and work' – While there is a relationship between work and potential energy (the work done by gravity equals the negative change in gravitational potential energy, W_gravity = -ΔU), this phrasing is less direct as a primary correlation for the scenario described. It emphasizes work and energy change rather than the exchange between KE and PE that dominates the system’s behavior under gravity alone. 
Option c: 'Power and work' – Power is the rate at which work is done (P = dW/dt). Although related, this option points to a rate concept rather than the energy-form correspondence central to motion under gravity. It does not capture the essential energy-trading relationship that defines the system's dynamics. 
Option d: 'Kinetic energy and power' – Power relates to how quickly kinetic energy changes, but this is not the direct, defining correlation when only gravity acts. It describes the rate of energy change rather than the primary energy forms themselves and their direct exchange. 
To recap, the most fundamental and direct connection in a gravity-only scenario is the interconversion between kinetic and potential energy, governed by mechanical energy conservation. The other options describe valid relationships in different contexts, but they do not embody the primary, direct correlation emphasized by gravity-alone motion.

When the only external force acting is gravity there is a direct correlation between:单项选择题

类似问题

A car’s engine stalls going up a hill and slows down as a result. Which statement best describes the energies of the car?

Scientists classify energy as either Kinetic or __________.

Question at position 8 An excess of growth hormone (GH) before puberty can result in the development ofgigantism.Graves' disease.acromegaly.pituitary dwarfism.Clear my selection

Question at position 6 The most abundant supporting cells in the central nervous system are called Question Blank 1 of 1[input].

Question at position 5 In the eye, the lens functions tofocus light on the retina at the back of the eye.protect the surface of the eye.increase vision in low-light conditions.move the eye side to side.Clear my selection

Question at position 4 Olfactory (odor) receptors are chemoreceptors. TrueFalse

If the pKa of HCHO2 is 3.74 and the pH of an HCHO2/NaCHO2 solution is 3.00, which of the following is TRUE?

Identify the missing particle in the following nuclear equation: 92 236 𝑈 → 38 90 𝑆 𝑟 + ? + 2 0 1 𝑛 + 4 0 0 𝑔

更多留学生实用工具

智能学习助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单