An object moving along a horizontal surface approaches the bottom of a ramp. At the very bottom of the ramp, point A, its speed is 40 m/s. The object goes up the ramp and reverses direction at point B
What is the height of point B above point A? The angle of inclination is 30°. Neglect friction and use g = 10 m/s2. A) 50 m
B) 60 m
C) 70 m
D) 80 m
E) 90 m
D
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A ballerina spins initially at 1.5 revolutions/second when her arms are extended. She then draws in her arms to her body and her moment of inertia becomes 0.88 kg- and her angular speed increases to 4.0 rev/s
Determine her initial moment of inertia.
Of all the planets known in antiquity, ________ is the hardest to observe visually
Fill in the blank(s) with correct word
A car travels a distance of 100 km in 2.00 hours. It then travels an additional distance of 60.0 km in 1.00 hour. The average speed of the car for the entire trip is
A. 80.0 km/hr. B. 60.0 km/hr. C. 53.3 km/hr. D. 50.0 km/hr. E. 46.7 km/hr.
The interrelationship among the processes that produce the three classes of rock is referred to as
a. the rock cycle. b. the bedding principle. c. the principle of cross-cutting relationships. d. metamorphism.