Problem 2 You throw a rock with initial speed v₂ = 5 m/s, from height h = 12 m above the ground, as shown in the figure. While keep- ing v; constant, you can choose the throwing angle 0₁. The pos- itive value is going slightly up, 0° is throwing horizontally, and negative value is slightly down- ward. DOOOO ● ● ● • The rock reaches the ground in shortest amount of time when... (a) 0 = 30° (b) = -30° (c) 0 = 0° (d) The time of the flight is the same for all throwing angles. • The rock hits the ground with highest speed when... (a) 0 = 30° (b) 0 = -30° (c) 0 = 0° (d) The final speed is the same for all throwing angles. • Work done by gravity is largest when... (a) 0 = 30° (b) = -30° (c) 0 = 0° (d) Work done by gravity is the same for all throwing angles.
Problem 2 You throw a rock with initial speed v₂ = 5 m/s, from height h = 12 m above the ground, as shown in the figure. While keep- ing v; constant, you can choose the throwing angle 0₁. The pos- itive value is going slightly up, 0° is throwing horizontally, and negative value is slightly down- ward. DOOOO ● ● ● • The rock reaches the ground in shortest amount of time when... (a) 0 = 30° (b) = -30° (c) 0 = 0° (d) The time of the flight is the same for all throwing angles. • The rock hits the ground with highest speed when... (a) 0 = 30° (b) 0 = -30° (c) 0 = 0° (d) The final speed is the same for all throwing angles. • Work done by gravity is largest when... (a) 0 = 30° (b) = -30° (c) 0 = 0° (d) Work done by gravity is the same for all throwing angles.
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Transcribed Image Text:Problem 2 You throw a rock with initial
speed v₂ = 5 m/s, from height
h 12 m above the ground, as
shown in the figure. While keep-
ing v; constant, you can choose
the throwing angle 0₁. The pos-
itive value is going slightly up,
0° is throwing horizontally, and
negative value is slightly down-
ward.
●●●●●●●DO
• The rock reaches the ground in shortest amount of time when...
(a) 0 = 30°
(b) = -30°
(c) 0 = 0°
(d) The time of the flight is the same for all throwing angles.
• The rock hits the ground with highest speed when...
(a) 0 = 30°
(b) 0 = -30°
(c) 0 = 0°
(d) The final speed is the same for all throwing angles.
• Work done by gravity is largest when...
(a) 0 = 30°
(b) 0 = -30°
(c) 0 = 0°
(d) Work done by gravity is the same for all throwing angles.
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