Two blocks of masses 20 kg and 9.0 kg are connected together by a light string and rest on a frictionless level surface. Attached to the 9.0-kg mass is another light string, which a person uses to pull both blocks horizontally. If the two-block system accelerates at 0.80 m/s2, what is the tension in the second string attached to the 9.0-kg mass?

a. 23 N
b. 14 N
c. 16 N
d. 7.2 N
e. 25 N


a

Physics & Space Science

You might also like to view...

Vector 1 is 7 units long and is at 70°. Vector 2 is 5 units long and is at 155°. Vector 3 is 3 units long and is at 225°. Which vector has equal-magnitude components?

a. Vector 1 b. Vector 2 c. Vector 3 d. None of the vectors has equal-magnitude components.

Physics & Space Science

Which of the following is transported by all traveling waves?

A) light B) matter C) particles D) energy E) both energy and matter

Physics & Space Science

The only place outside of Earth where there is irrefutable evidence for (ancient, microbial) life is

A) the Moon. B) Mars. C) Europa. D) Titan. E) None of the above—there is no irrefutable evidence for life beyond Earth.

Physics & Space Science

Which of the following telescopes must be used above Earth's atmosphere?

a. an optical telescope b. the VLBA telescope c. an X-ray telescope d. a radio telescope e. None of the other choices are correct.

Physics & Space Science