A child throws a ball with an initial speed of 8.00 m/s at an angle of 40.0° above the horizontal. The ball leaves her hand 1.00 m above the ground and experience negligible air resistance
(a) What is the magnitude of the ball's velocity just before it hits the ground?
(b) At what angle below the horizontal does the ball approach the ground?
(a) 9.14 m/s (b) 47.9°
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A. 20 B. 30 C. 40 D. 10 E. 50
During a snowball fight, two balls with masses of 0.4 and 0.6 kg, respectively, are thrown in such a manner that they meet head-on and combine to form a single mass. The magnitude of initial velocity for each is 20 m/s. What is the speed of the 1.0-kg mass immediately after collision?
a. zero c. 4 m/s b. 3 m/s d. 5 m/s
In using Ampere's law, the integral must be evaluated
A) around a path that lies in a plane. B) in a clockwise direction. C) around a closed path. D) around a circular path. E) in a counter-clockwise direction.
The celestial sphere is divided into 88 modern constellations
Indicate whether the statement is true or false