1) Which is the correct equation that expresses Newton’s second law for the moti

ID: 1420319 • Letter: 1

Question

1) Which is the correct equation that expresses Newton’s second law for the motion of the block along the table? (T is the tension in the string).

a. T + ? k m 1 g = m 1 a

b. T ? m 1 g = m 1 a

c. T ?? k m 1 g = m 1 a

d. T ? ? k m 1 g = m 2 a

2) Which is the correct equation that expresses Newton’s second law for the motion of the hanging block? (T is the tension in the string).

a. ? k m 2 g ? T = m 2 a

b. m 2 g ? T = m 2 a

c. m 1 g ? T = m 1 a

d. m 2 g ? T ? F N = m 2 a

3) Which is the correct statement from the list below?

a. The two masses have different acceleration because they are moving in different directions.

b. The two masses have different acceleration because they have different masses.

c. Only one of the masses is accelerating.

d. The two masses have the same acceleration (magnitude) because they are rigidly connected by the string.

4) What is the common acceleration (magnitude) of the two blocks? (Use g = 10m/s2)

a. 10 m/s2

b. 7.3 m/s2

c. 6 m/s2

d. 4m/s2

1) T k m 1 g = m 1 a

2) m 2 g T = m 2 a

3) The two masses have the same acceleration (magnitude) because they are rigidly connected by the string.

4) Adding equations of part 1 and dpart 2

m2g - km1g = (m1 + m2)a

a = (4*10-0.2*2*10)/(4+2)= 6m/s2

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