While you stand on the floor you are pulled downward by gravity, and supported upward by the floor. Gravity pulling down and the support force pushing up

A) make an action-reaction pair of forces.
B) do not make an action-reaction pair of forces.
C) need more information


Answer: B

Physics & Space Science

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Rotational Dynamics: A cinder block of mass m = 4.0 kg is hung from a nylon string that is wrapped around a frictionless pulley having the shape of a cylindrical shell, as shown in the figure. If the cinder block accelerates downward at 4.90 m/s2 when it is released, what is the mass M of the pulley?

A. 2.0 kg B. 4.0 kg C. 6.0 kg D. 8.0 kg E. 10 kg

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A child pulls on a wagon with a horizontal force of 75 N. If the wagon moves horizontally a total of 42 m in 3.0 min, what is the average power generated by the child?

A) 18 W B) 22 W C) 24 W D) 27 W

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The "words" that make up the genetic code contain how many letters?

A) 4 B) 20 C) 5 D) 3

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Quarks are bound together in hadrons by

a. the strong force. b. the weak force. c. intermediate (or gauge) bosons. d. the color force.

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