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What is the weight of a body with mass 25 kg (take g = 9.8 m/s²)?

Answer

Weight is the gravitational force on a mass: $W = mg$. For $m = 25\,\text{kg}$ and $g = 9.8\,\text{m/s}^2$, the weight is $W = 25 \times 9.8 = 245\,\text{N}$ (downward).

Explanation

What the question is asking

You are given the mass of an object and asked for its weight, which is the force due to gravity acting on that mass.

Use the weight formula

Weight is calculated by: $$W = mg$$ where:

  • $W$ is weight in newtons (N)
  • $m$ is mass in kilograms (kg)
  • $g$ is gravitational field strength in $\text{m/s}^2$

Substitute the values

$$W = 25 \times 9.8 = 245\,\text{N}$$

Direction and units check

  • The unit is newtons because weight is a force.
  • The force acts downward, toward Earth’s center.
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Skills You Achive
using formulas unit conversion newtonian mechanics basic arithmetic

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