3 Flashcards
What is the equation for final velocity in uniformly accelerated motion?
V_f = V_i + at
What is the equation for distance in uniformly accelerated motion?
d = V_i t + 1/2 at^2
What is the equation relating final velocity squared to initial velocity and acceleration?
V_f^2 = V_i^2 + 2ad
What condition must be met for the equations of uniformly accelerated motion to be applicable?
Acceleration must be constant
True or False: Air resistance can be ignored in projectile motion under special circumstances.
True
What is the vertical acceleration of a projectile in free fall?
g = –9.8 m/s²
What shape does the center of mass of a projectile follow during its flight?
Parabolic path
What happens to vertical velocity at the peak of a projectile’s flight?
Vertical velocity is exactly zero
What factors influence projectile motion?
- Velocity of release
- Relative height of release
- Angle of release
Fill in the blank: The optimum angle of release for maximum distance on level ground is ______.
45°
What occurs when the height of takeoff is greater than the height of landing in projectile motion?
Optimum angle of release is less than 45°
How does increasing the speed of release affect projectile motion?
Increases distance and time of flight
What is the effect of angle of release on horizontal and vertical velocities?
Affects their ratio; overall effect is minimal
What is the effect of height of release on projectile motion?
Increases time of flight
What is the relationship between time up and time down when height of takeoff equals height of landing?
time_up = time_down
In the context of long jump, what is the optimum takeoff angle considering a relative height greater than 0?
Less than 45°
What is the total time of flight if the ascent and descent times are equal?
t_total = t_up + t_down
How do jumping mats work in relation to time of flight?
Time is divided equally between ascent and descent
What determines the maximum reach height in jumping?
- Maximize takeoff height
- Maximize flight height
- Minimize loss height
What is the significance of takeoff velocity in projectile motion?
It determines the initial velocity of the projectile
True or False: The vertical speed at takeoff is equal to the vertical speed at landing when height is equal.
True
What happens to vertical speed at the apex of a jump?
Vertical speed is 0 m/s
