Recall that gravity applies a constant downwards acceleration of 9.8m/sAt rest, what is the approximate ground reaction force applied to a person weighing 62kg?

Question

BlackTom AI · Accepted Answer

The question asks: Recall that gravity applies a constant downwards acceleration of 9.8 m/s^2. At rest, what is the approximate ground reaction force applied to a person weighing 62 kg?

Option a. 600N: This is the closest approximation to the weight of a 62 kg person, since weight equals mass times gravitational acceleration (W = m g ≈ 62 kg × 9.8 m/s^2 ≈ 607.6 N). Rounding to about 600 N is reasonable for a quick estimate.

Option b. 62N: This would imply a force equal to the mass alone, ignoring gravity. It mistakenly treats mass as a force without incorporating g, which is incorrect for weight or ground reaction in this context.

Option c. 980N: This corresponds to 1000 N roughly, which would be the weight of a 100 kg mass (100 kg × 9.8 m/s^2 ≈ 980 N). For 62 kg, this is an overestimate by about 16% and does not reflect the given mass.

Option d. 6KN: This is 6000 N, which would be appropriate only for a mass around 610 kg, far larger than 62 kg. It misplaces the scale by roughly a factor of ten, making it clearly unrealistic here.

Option e. 98N: This number equals 62 × 1.58 approximately, which does not correspond to the gravitational acceleration of 9.8 m/s^2. It underestimates the true weight by a substantial margin and reflects a conceptual error in multiplying mass by g.

To connect with the physics idea: the ground reaction force when standing at rest balances the weight, so the normal force equals m g if there are no other vertical forces. Substituting m = 62 kg and g ≈ 9.8 m/s^2 gives W ≈ 607.6 N, which is usually rounded to about 600 N in quick calculations. The other options either omit g, use an incorrect mass, or apply an improbable multiplier, leading to incorrect conclusions about the ground reaction force.

Recall that gravity applies a constant downwards acceleration of 9.8m/sAt rest, what is the approximate ground reaction force applied to a person weighing 62kg?

查看解析

登录即可查看完整答案

类似问题

Two objects are attracted to each other by a gravitational force F. If the distance between the objects is doubled, what is the new gravitational force between the objects in terms of F?

What is the force of gravity acting on an astronaut of mass 76.5 kg on a planet of mass 2.8 × 1024 kg and radius 4000 km? Give your answer to the nearest whole number. G is 6.67 × 10-11 in SI units.

A ball is thrown vertically upwards, reaches its highest point, then drops down to the ground, bounces once,reaches a height of 1.2 m, then falls again and finally rests on the grass. At which one or more times is the gravitational force on the ball zero?

A rock is thrown from a cliff and lands in a river below. When the rock is at position X and taking into account the influence of air resistance, which of the following describes the direction of the gravitational force on the rock?

Compared to its weight on Earth, a 32.5-kg object on the Moon (gravity on moon = 1.63m/s2) will weigh

If an object at the surface of the Earth has a weight W, what would be the weight of the object if it was transported to the surface of a planet that is one-sixth the mass of Earth and has a radius one third that of Earth?

更多留学生实用工具

考试浏览器助手

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