Statements 2 and 4 are correct. The velocity changes because the initial velocity is zero and each second they gain 9.8 m/s of velocity, which is the constant acceleration. Because there is no air resistance, they will land at the same time, and gravity acts equally upon both objects, so the velocity of both metal balls should always be the same.
Answer: A. Gravity is the force that pulls all things together
We are told that 4.0
complete waves pass a fixed point in 10 seconds. Using these data, we can find the frequency of the wave, which is given by the number of complete cycles per second:
Now we can find the period of the wave, which is the reciprocal of the frequency:
So, the correct answer is (3) 2.5 s.
1. The number is between 7/7 = 1 and 14/7 = 2. You have marked the appropriate choice.
2. Comparing different fractions can be done several ways. one way is to convert them to decimal number of appropriate precision. Here, that might be
... -0.33 ? -0.40
-0.33 will be farther to the right on the number line so is greater than -0.40.
... -1/3 > -2/5
3. When the factors keep their order, but the parentheses are moved, the Associative Property of Multiplication is involved.
Answer:
Explanation:
m1 = 3.77 kg (0, 0 )
m2 = 6.7106 kg ( 5.72 cm, 11.44 cm)
m3 = 2.46181 kg (16.7024 cm, 0 cm )
Let x and y be the coordinates of centre of mass.
x = 6.1428 cm
y = 5.9316 cm
