Two blocks, m1 = 1.0 kg and m2 = 2.0 kg, are connected by a light string as shown in the figure. If the radius of the pulley is 1.0 m and its rotational inertia is 5.0 kg?m2, the acceleration of the system is
?
?
a.
(1/6)g
b.
(3/8)g
c.
(1/8)g
d.
(1/2)g
e.
(5/8)g
c
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Jim and Mary are carrying Bob on a horizontal stretcher. The uniform stretcher is 2.00 m long and weighs 80 N. Bob weighs 600 N. Bob's center of gravity is 80 cm from Mary. Jim and Mary are at the ends of the stretcher. The force that Mary is exerting to support the stretcher, with Bob on it, is
A. 550 N. B. 400 N. C. 300 N. D. 280 N. E. 200 N.
Potential: The electron-volt is a unit of
A. charge. B. electric potential. C. electric field. D. electric force. E. energy.
The physical characteristic that is used to distinguish intrusive igneous rocks from extrusive igneous rocks is _____________
a. silica content b. hardness c. color d. grain size
Why is the strange quark strange?
A.) It is more massive than any other kind of quark. B.) It is less massive than any other kind of quark. C.) It is blue. D.) It lives longer than we would expect. E.) It is charmed.