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?

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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?

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