Answer :

To find the force of gravity acting on an object with a mass of 20 kg on Earth, you can use the formula:

[tex]\[ F = m \times g \][/tex]

Where:
- [tex]\( F \)[/tex] is the force of gravity,
- [tex]\( m \)[/tex] is the mass of the object,
- [tex]\( g \)[/tex] is the acceleration due to gravity on Earth, which is approximately [tex]\( 9.8 \, \text{m/s}^2 \)[/tex].

Step-by-step calculation:

1. Identify the given values:
- The mass ([tex]\( m \)[/tex]) of the object is 20 kg.
- The acceleration due to gravity ([tex]\( g \)[/tex]) is [tex]\( 9.8 \, \text{m/s}^2 \)[/tex].

2. Substitute these values into the formula:
- [tex]\( F = 20 \, \text{kg} \times 9.8 \, \text{m/s}^2 \)[/tex].

3. Perform the multiplication:
- [tex]\( F = 196 \, \text{N} \)[/tex].

The force of gravity acting on the object is 196 Newtons. Therefore, the correct answer is:

B) 196 N

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Rewritten by : Barada