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Questions and Answers
What are the components of velocity denoted by v_x and v_y in projectile motion?
What are the components of velocity denoted by v_x and v_y in projectile motion?
- v_x represents the horizontal component and v_y represents the vertical component (correct)
- v_x represents the vertical component and v_y represents the horizontal component
- v_x represents the displacement in the x-direction and v_y represents the displacement in the y-direction
- v_x represents the acceleration in the x-direction and v_y represents the acceleration in the y-direction
In Table 3-2, which direction is taken as positive for y in projectile motion?
In Table 3-2, which direction is taken as positive for y in projectile motion?
- Horizontal
- Upward (correct)
- Diagonal
- Downward
How can Eqs 2-11 be simplified for projectile motion?
How can Eqs 2-11 be simplified for projectile motion?
- By setting a_x = -9.80 m/s² and a_y = g
- By setting a_x = g and a_y = -9.80 m/s²
- By setting a_x = -g and a_y = 0
- By setting a_x = 0 and a_y = -g (correct)
What is the value of acceleration (a_y) due to gravity during projectile motion assuming y is positive upward?
What is the value of acceleration (a_y) due to gravity during projectile motion assuming y is positive upward?
If y is taken as positive downward in projectile motion, what happens to the signs in front of g?
If y is taken as positive downward in projectile motion, what happens to the signs in front of g?
In Fig. 3-20, what does the projection angle θ (theta) represent in relation to the +x axis?
In Fig. 3-20, what does the projection angle θ (theta) represent in relation to the +x axis?
Study Notes
Projectile Motion Components
- In projectile motion, velocity can be broken down into two components: v_x (horizontal) and v_y (vertical).
Direction of y in Projectile Motion
- In Table 3-2, the positive direction for y is taken as upward.
Simplifying Equations for Projectile Motion
- Eqs 2-11 can be simplified for projectile motion.
Acceleration due to Gravity
- The acceleration due to gravity (a_y) during projectile motion is equal to -g, where g is 9.8 m/s², assuming y is positive upward.
Alternative Direction for y
- If y is taken as positive downward, the signs in front of g change.
Projection Angle θ (theta)
- In Fig. 3-20, the projection angle θ (theta) represents the angle of projection relative to the +x axis.
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Description
Test your understanding of projectile motion problem solving with quantitative examples. This quiz covers the use of kinematic equations separately for the vertical and horizontal components of the motion, as well as the general case of two-dimensional motion at constant acceleration.
