A 2200. kg auto moving at 12.0 m/s runs into a 3800. kg truck which is moving in the same direction at 5.00 m/s. The collision is perfectly inelastic
(a) What is the speed of the auto immediately after the collision?
(b) What percentage kinetic energy did the truck gain in the collision?
(a) 7.57 m/s
(b) 129.% gain
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A waiter in a restaurant fills a pitcher full of water and ice so that water would spill out if any more were added. As the ice starts to melt
A. the water level in the pitcher falls. B. the water level in the pitcher remains the same. C. water starts to flow out the spout of the pitcher. D. the pressure on the bottom of the pitcher decreases. E. the pressure on the bottom of the pitcher increases.
A person looks horizontally at the edge of a swimming pool. If its length is 5 m, and the pool is filled to the surface, to what depth (in m) could the observer see? (n for water is 1.33.)
a. 3.2 b. 4.4 c. 2.1 d. 1.0 e. 0.3
0.00325 × 10-8 cm can also be expressed in mm as
A) 3.25 × 10-12 mm. B) 3.25 × 10-11 mm. C) 3.25 × 10-10 mm. D) 3.25 × 10-9 mm. E) 3.25 × 10-8 mm.
A race car travels 40 m/s around a banked (45° with the horizontal) circular (radius = 0.20 km) track. What is the magnitude of the resultant force on the 80-kg driver of this car?
a. 0.68 kN b. 0.64 kN c. 0.72 kN d. 0.76 kN e. 0.52 kN