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Answer :
To solve the two questions you provided, we need to find the correct answers step by step.
1. Force of gravity acting on an object:
To calculate the force of gravity acting on an object on Earth, we use the formula:
[tex]\[ \text{Force of gravity} = \text{mass} \times \text{acceleration due to gravity} \][/tex]
On Earth, the acceleration due to gravity is approximately [tex]\(9.8 \, \text{m/s}^2\)[/tex].
For an object with a mass of [tex]\(20 \, \text{kg}\)[/tex]:
[tex]\[ \text{Force of gravity} = 20 \, \text{kg} \times 9.8 \, \text{m/s}^2 = 196 \, \text{N} \][/tex]
So, the force of gravity acting on the object is 196 N. Thus, the correct answer for the multiple-choice question is A) 196 N.
2. Average speed of a car traveling from Boston to Hartford:
To find the average speed of the car, we use the formula:
[tex]\[ \text{Average speed} = \frac{\text{Total distance}}{\text{Total time}} \][/tex]
Given that the distance between Boston and Hartford is 240 kilometers and the time taken is 4 hours:
[tex]\[ \text{Average speed} = \frac{240 \, \text{kilometers}}{4 \, \text{hours}} = 60 \, \text{km/h} \][/tex]
Therefore, the average speed of the car during the trip was 60 km/h.
1. Force of gravity acting on an object:
To calculate the force of gravity acting on an object on Earth, we use the formula:
[tex]\[ \text{Force of gravity} = \text{mass} \times \text{acceleration due to gravity} \][/tex]
On Earth, the acceleration due to gravity is approximately [tex]\(9.8 \, \text{m/s}^2\)[/tex].
For an object with a mass of [tex]\(20 \, \text{kg}\)[/tex]:
[tex]\[ \text{Force of gravity} = 20 \, \text{kg} \times 9.8 \, \text{m/s}^2 = 196 \, \text{N} \][/tex]
So, the force of gravity acting on the object is 196 N. Thus, the correct answer for the multiple-choice question is A) 196 N.
2. Average speed of a car traveling from Boston to Hartford:
To find the average speed of the car, we use the formula:
[tex]\[ \text{Average speed} = \frac{\text{Total distance}}{\text{Total time}} \][/tex]
Given that the distance between Boston and Hartford is 240 kilometers and the time taken is 4 hours:
[tex]\[ \text{Average speed} = \frac{240 \, \text{kilometers}}{4 \, \text{hours}} = 60 \, \text{km/h} \][/tex]
Therefore, the average speed of the car during the trip was 60 km/h.
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