A stone with a mass of 100 kg sits on the ground. Gravity acts on the stone at a rate of 9.8 m/s2. What is the normal force acting on the stone, keeping it at rest?(1 point)

Question

Responses

91.2 N
91.2 N

98 N
98 N

980 N
980 N

9.8 N

Answer 1

To find the normal force acting on the stone, we first need to calculate the weight of the stone, which is the force due to gravity acting on it. The weight can be calculated using the formula:

\[ \text{Weight} = \text{mass} \times \text{gravity} \]

Given:

• Mass of the stone = 100 kg
• Acceleration due to gravity = 9.8 m/s²

Now, substituting the values into the formula:

\[ \text{Weight} = 100 , \text{kg} \times 9.8 , \text{m/s}^2 = 980 , \text{N} \]

Since the stone is resting on the ground and there are no other vertical forces acting on it, the normal force must equal the weight of the stone to keep it at rest:

\[ \text{Normal Force} = 980 , \text{N} \]

Therefore, the correct response is:

980 N