Time= v*sintheta/g = 10*1/9.8= 1.02s therefore h=1/2*9.8*(1.02)^2= 5.10m
Answer:
A.
Explanation:
Tornados normally form due to warm and cold are colliding with each other. For example, this happens commonly in the middle of the U.S because of the cold air coming down from the Arctic and the warm air from Mexico and other countries in the South.
The acceleration of the train at the give initial and final velocity is determined as 10.5 m/s².
<h3>Acceleration of the train</h3>
The acceleration of the train is calculated as follows;
a = Δv/t
where;
- u is initial velocity = 162 km/hr = 45 m/s
- v is final velocity of the car = 540 km/hr = 150 m/s
a = (150 - 45)/10
a = 10.5 m/s²
Thus, the acceleration of the train at the give initial and final velocity is determined as 10.5 m/s².
Learn more about acceleration here: brainly.com/question/605631
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-- During the time the ball is flying from the high roof to the low roof,
it's going to fall (100-25) = 75 meters.
How long does it take an object dropped from rest to fall 75 meters ?
Distance = (1/2) · (gravity) · (time)²
75 m = (4.9 m/s²) · (time)²
Time² = (75 m) / (4.9 m/s²)
Time² = 15.31 sec²
Time = √(15.31 sec²) = 3.91 seconds
So the ball has to cover the horizontal distance of 20 meters
in 3.91 seconds.
Distance = (speed) · (time)
20 m = (speed) · (3.91 sec)
Speed = (20 m) / (3.91 sec)
Speed = 5.11 m/s