Explanation:
Using Kinematics, we have v² = u² + 2as.
=> v² = (0m/s)² + 2(5.7m/s²)(80m)
=> v² = 912m²/s²
=> v = 30.2m/s.
The hailstone will hit the earth in 4.04 seconds.
we move 9.8 meters per second faster thanks to gravity. we start to fall after one second at 9.8 m/s. we start falling at 19.6 m/s after two seconds, and so forth.
From the query, the following information may be deduced:
Height (H) = 120 m
Gravitational acceleration (g)=9.8 m/s2.
Time (t)=?
It is possible to determine the hailstone's impact time as:
h=1/2 gt²
120= 1/2 x 9.8 x t²
120x2/9.8=t²
t²=24.48
t=4.94 s
therefore, the calculated time taken is 4.94 s.
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Answer:
Explanation:
<u>The total momentum of a system is defined by:</u>
Where,
is the total momentum or it could be expressed also as 
.
and 
represents the masses of the objects interacting in the system.
and 
are the velocities of the objects of the system.
<em>Remember: </em><em>The momentum is a fundamental physical magnitude of vector type.</em>
We have:
We are going to take the east side as positive, and the west side as negative. Then the velocity of the car B, has to be <u>negative</u>. It goes in a different direction from car A.
Then the total momentum of the system is:
Answer:
False
Explanation:
Boiling water is not a chemical change it is a Physical change
<h3>
Hope this helps PLEASE MARK AS BRAINLIEST !!</h3>
No work is being performed on the object unless the object is moving, as work done = force x distance
