The height of the building is 53.4 m (projectile motion)
Explanation:
The motion of the ball is a projectile motion, so it follows a parabolic path which consists of two independent motions:
- A uniform motion (constant velocity) along the horizontal direction
- An accelerated motion with constant acceleration (acceleration of gravity) in the vertical direction
First of all, we consider the horizontal motion, which is a uniform motion at constant speed. The equation that gives the horizontal distance travelled is:
where:
is the horizontal velocity of the ball, which is constant since there are no forces in this direction
d = 165 m is the horizontal distance travelled by the ball
Solving for t, we find the time of flight:
Now we analyze the vertical motion: it is an accelerated motion, we can use the suvat equation
where
s is the vertical displacement, which is the height of the building
u = 0 is the initial vertical velocity of the ball
t = 3.3 s is the time of flight
is the acceleration of gravity
Solving for s, we find the height of the building:
Learn more about projectile motion here:
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100 J
B.
200 J
C.
400 J
D.
600 J
Answer:
Explanation:
In physics, work is defined as
Where is the word done, is the force that move the object and is the change of the position of the object.
In this case, we have
, remember that the difference refers to the actual subtraction between the final point and the initial point of the object.
Replacing these values, we have
Therefore, the right answer is C. The work done is 400 Joules
Answer:
400 J
Explanation:
I just took the test and can confirm this.
Answer:
the the waterside exits in a mountain in in our river
Explanation:
the water comes from the Icebergsand foam water bodies and make a river and then it forms lakes and tributaries