How much work must be done by frictional forces in slowing a 1000-kg car from 26m/s to rest?
A) 3.41 × 105 J
B) 2.73 × 105 J
C) 4.09 × 105 J
D) 4.77 × 105 J
A
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Experimenting is part of the scientific method
Indicate whether the statement is true or false
Refer to Figure 6-11. Block A has a mass of 2.00 kg and rests on a rough table and is connected to block B, which has a mass of 3.00 kg, after passing over an ideal pulley, as shown. Block B is released from rest. The coefficient of kinetic friction between block A and the table is 0.300. What is the acceleration of the masses?
A. 6.54 m/s2 B. 3.92 m/s2 C. 4.71 m/s2 D. 0.981 m/s2 E. 5.89 m/s2
The surface tension of water is 0.073 N/m. How high will water rise in a capillary tube of diameter 1.20 mm?
What will be an ideal response?
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a) Mars has an atmosphere which deteriorates and regenerates on a yearly cycle. b) It rotates only a few times during each orbit around the Sun. c) Mars has a very elliptical orbit that brings it very close to the Sun during summer,and far from the Sun during winter. d) Its orbit is circular. e) Its axis is tilted relative to its orbital plane.