The ozone layer protects us from the harmful effects of which type of radiation?
1 answer:
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Answer:
8.2 m/s
Explanation:
The horizontal component of the velocity is given by:
where
v = 10 m/s is the magnitude of the velocity
is the angle at which the ball has been thrown, with respect to the horizontal
Substituting the values into the equation, we get
Answer:
Explanation:
We can use one of the kinematics equation to find the acceleration.
v = u + at
where v = final velocity, in m/s
u = initial velocity, in m/s
t = time in seconds
Given the information provided from the question,
v = 25m/s
u = 0m/s
t = 10s
Substitute these values into the kinematics equation.
25 = 0 + 10a
10a = 25
a = 25 / 10
=
Answer:
W = -2*10⁵ J
Explanation:
- Assuming no friction present, we can find the work done by an external force stopping the car, applying the work-energy theorem.
- This theorem says that the total work done on one object by an external net force, is equal to the change in the kinetic energy of the object.
- If the automobile is brought to a complete stop, we can find the change of the kinetic energy as follows:
- So, the total work done in stopping the automobile, is -2*10⁵ J. The minus sign stems from the fact that the force and the displacement have opposite directions.