Answer:
(a) θ = 20°
(b) Time Delay = 2.84 s
Explanation:
(a)
This is the case of the projectile motion. In projectile motion, for the same launch speed, the range of a projectile is the same for the complimentary launch angles. Hence, the snowball will have the same range when launched at 70°, at an angle of:
<u>θ = 20°</u>
<u></u>
(b)
The time of flight of snowball can be found by the following formula:
where,
T = Time of flight = ?
u = launch speed = 23.3 m/s
g = acceleration due to gravity = 9.81 m/s²
For θ = 70° :
T₇₀ = 4.46 s
For θ = 20° :
T₂₀ = 1.62 s
Therefore, the time delay can be calculated as follows:
<u>Time Delay = 2.84 s</u>