This is an object's change in motion per unit time in a specified direction.
2 answers:
Answer:
Velocity
Explanation:
Motion can be described as change in position of an object in a time interval.
Velocity describes an object's change in motion per unit time in a specified direction.
Velocity is a vector quantity. It has magnitude as well as direction. It represents change in displacement over a time interval.
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Answer:
v = 31.3 m / s
Explanation:
The law of the conservation of stable energy that if there are no frictional forces mechanical energy is conserved throughout the point.
Let's look for mechanical energy at two points, the highest where the body is at rest and the lowest where at the bottom of the plane
Highest point
Em₀ = U = m g y
Lowest point
= K = ½ m v²
As there is no friction, mechanical energy is conserved
Em₀ =
m g y = ½ m v²
v = √ 2 g y
Where we can use trigonometry to find and
sin 30 = y / L
y = L sin 30
Let's replace
v = RA (2 g L sin 30)
Let's calculate
v = RA (2 9.8 100.0 sin30)
v = 31.3 m / s
Answer:
Explanation:
(a)
Given:
- mass of comet,
- velocity of the comet,
<u>Now, the kinetic energy of the comet can be given by:</u>
(b)
Given:
- energy released by 1 megaton of TNT,
<u>Now the kinetic energy of the comet in terms of energy of 1 megaton TNT:</u>
i.e.