Answer:
In a concave mirror, if an object is located between the center of curvature and the focal point, what is the best way to describe the image formed? Real, inverted, and smaller than the object. Real, inverted, and larger than the object. light rays travel parallel to each other, no other image is formed.
Answer:
90
Explanation:
take note that V= (velocity is distance over (divided by) time. so in this case its 198(distance) divided by 2.2 (time) =90
Answer:
Explanation:
Given that,
The elevator slow to stop, this shows that it is decelerating and the final velocity is 0
v = 0m/s
Constant deceleration
a = -1m/s²
It is negative because it is deceleration
The distance the elevator descend is 4.5m
S=4.5m
Then, we want to find the time the elevator spent before stopping
Using the equation of motion
v = u + at
v² = u² + 2as
Where
v is final velocity
u Is initial velocity
a is the deceleration
s- is distance traveled
From here we can find the initial velocity of the elevator
v² = u² + 2as
0² = u² - 2 × 1 × 4.5
0 = u² - 9
u² = 9
u = √9
u = 3m/s
The initial speed is 3m/s
Then, to find the time taken, we can use the first equation
v = u + at
0 = 3 - 1 × t
0 = 3 - t
t = 3 seconds
The time taken before the elevator stop is 3 secs
Answer:
3 days to get from earth to moon
Explanation:
(a) The ball’s maximum speed over the net is v(max) = √2gh.
(b) The maximum speed of the horizontally moving ball clearing the net is about 27 m/s.
(c) Speed of the ball is independent of its mass.
<h3>
Time of motion of the ball</h3>
The time of motion of the ball is calculated as follows;
h = vt + ¹/₂gt²
1 = 0 + ¹/₂(9.8)t²
1 = 4.9t²
t² = 1/4.9
t² = 0.204
t = 0.452 s
<h3>Horizontal speed of the ball</h3>
The horizontal speed of the ball is calculated as follows;
X = vt
v = X/t
v = (12 m)/(0.452)
v = 26.6 m/s ≈ 27 m/s (proved)
<h3>Conservation of energy</h3>
P.E = K.E
mgh = ¹/₂mv²
gh = ¹/₂v²
2gh = v²
√2gh = v(max)
Speed of the ball is independent of its mass.
Learn more about horizontal velocity here: brainly.com/question/24681896
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