A projectile is thrown up with a speed v, at an angle 0 to the horizontal. Which of the following statements is true at the peak of its trajectory? O Vx = V, cos (e) : %3D Vy 0; a, = -9.8 m/s? O Vx = V, cos(e) : Vy=-gt: ay=0 O v,=- v, = a = 0 O v, =0; Vy v, sin (e) : 0- e- e
A projectile is thrown up with a speed v, at an angle 0 to the horizontal. Which of the following statements is true at the peak of its trajectory? O Vx = V, cos (e) : %3D Vy 0; a, = -9.8 m/s? O Vx = V, cos(e) : Vy=-gt: ay=0 O v,=- v, = a = 0 O v, =0; Vy v, sin (e) : 0- e- e
Principles of Physics: A Calculus-Based Text
5th Edition
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter3: Motion In Two Dimensions
Section: Chapter Questions
Problem 7OQ: A projectile is launched on the Earth with a certain initial velocity and moves without air...
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Transcribed Image Text:A projectile is thrown up with a speed v, at an angle 0 to the horizontal. Which of the following statements is true at the
peak of its trajectory?
O Vx = V, cos (e) :
%3D
Vy 0;
ay = -9.8 m/s?
O Vx = V; cos(e);
Vy = -gt:
0 = e
O v,= v, = a = 0
O v, = 0;
Vy = V, sin(0) :
a, = a, = 0
Transcribed Image Text:QUESTION 4
An object is thrown horizontally from a height of 6 m with a speed of 18 m/s. If air resistance is ignored, how far away
will this object fall from the point it was thrown?
QUESTION 5
A particle moving along the positive X-axis at 12 m/s accelerates at 2.5 m/s² in the direction of the positive Y-axis. What
is the magnitude and direction of its velocity after 2.0 s?
O 2.5 m/s at 30° to the X-axis.
O 5 m/s at 45° to the X-axis.
O 3 m/s at angle of tan-1(3/5) to the X-axis
O 13 m/s at angle of tan (5/12) to the X-axis.
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