Two blocks, joined by a string, have masses of 6.0 and 9.0 kg. They rest on a frictionless, horizontal surface. A second string, attached only to the 6.0-kg block, has horizontal force = 45 N applied to it. Both blocks accelerate. Find the tension in the string between the blocks.
a. 18 N
c. 12 N
b. 27 N
d. 9.0 N
Question 2
A stone is thrown downward from a cliff. Take up to be the positive direction. Which of the following statements is true about the stone?
a. The velocity is negative, the acceleration is negative, and the speed is negative.
b. The velocity is positive, the acceleration is negative, and the speed is positive.
c. The velocity is negative, the acceleration is negative, and the speed is positive.
d. The velocity is positive, the acceleration is positive, and the speed is positive.
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