1. If a cat's mass is 1.20 kg, what is its weight in earth?
A. 11.9 N
B. 12.1 N
C. 12.2 N
D. 11.8 N
Is it D?
2. If a car weighs 6310 N on earth, what is its mass?
A. 625 kg
B. 663 kg
C. 682 kg
D. 644 kg
Help!!
yes on 1, on 2:
6310/9.8=
Thank you and #2 is D?
yes D
To answer the first question, we need to understand the relationship between mass and weight. Mass is a measure of the amount of matter in an object, while weight is the force of gravity acting upon that object. The equation to calculate weight is weight = mass * acceleration due to gravity.
On Earth, the acceleration due to gravity is approximately 9.8 m/s^2. So, to find the weight of the cat, we need to multiply its mass (1.20 kg) by the acceleration due to gravity (9.8 m/s^2).
Weight = 1.20 kg * 9.8 m/s^2 = 11.76 N
Since the given options are rounded values, we can conclude that the cat's weight on Earth is approximately 11.8 N. Therefore, the correct answer is D. 11.8 N.
Now, let's move on to the second question.
To find the mass of the car, we can rearrange the formula for weight:
Weight = mass * acceleration due to gravity
Rearranging the formula to solve for mass:
mass = weight / acceleration due to gravity
Plugging in the values given in the question:
mass = 6310 N / 9.8 m/s^2
mass ≈ 643.878 kg
Rounding to the nearest whole number, the car's mass is approximately 644 kg. Therefore, the correct answer is D. 644 kg.