What forces are included in a free-body diagram for an object?
a. The forces acting on the object and the forces the object exerts on any other objects it is in contact with.
b. The forces acting on the object and the forces the object exerts on all other objects in the system
c. Only the forces acting on the object.
d. Only forces internal to the object.
c
You might also like to view...
We can ignore an Einstein solid’s zero-point energy because
A. it is zero. B. it never changes in any thermal interaction. C. it is insignificant compared to the solid’s total energy. D. it is just a quantum-mechanical effect. E. other (specify).
A planet is detected via the Doppler technique. The shape of the periodic velocity pattern tells us
A) the planet's size. B) the planet's mass. C) the planet's density. D) the orbital period of the planet. E) the orbital eccentricity of the planet.
A steel piano string is attached, under tension, at each end to secure posts. When gently struck, a faint note can be detected coming from the string. The string is then cooled by blowing cold air over it and then is struck again. How does the note now detected compare to the previous one
a. It is the same since the posts don't move. b. It is at a higher frequency than the original one. c. It is at a lower frequency than the original one. d. More than one answer is correct.
A block of steel is found on a ship sunk in 5000 meters of water, where pressures are about 500 times that on the Earth at sea level. To know its dimensions at sea level, which relationship between stress and strain for this metal would we need to know?
1.Young's modulus 2.shear modulus 3.bulk modulus 4.none of these