which of these statements best explains why the difference between summer and winter temperatures is greatet in Russia thanin FL
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This question involves the concept of Newton's Second Law of Motion.
a) The acceleration is "1 m/s²".
b) The acceleration is "1.5 m/s²".
c) The amount of force needed is "100 N".
d) The force needed is "187.5 N".
e) The force needed is "280 N".
<h3>NEWTON'S SECOND LAW OF MOTION:</h3>According to Newton's Second Law of motion whenever an unbalanced force is applied on an object, it produces an acceleration in the object in the direction of the force itself.
Mathematically,
where,
- F = Applied Force
- m = mass of the object
- a = acceleration
a)
Here,
- F = 100 N
- m = 100 kg
- a = ?
Therefore,
<u>a = 1 m/s²</u>
<u></u>
b)
Here,
- F = 60 N
- m = 40 kg
- a = ?
Therefore,
<u>a = 1.5 m/s²</u>
<u></u>
c)
Here,
- F = ?
- m = 200 kg
- a = 0.5 m/s²
Therefore,
<u>a = 100 N</u>
<u></u>
d)
Here,
- F = ?
- m = 250 kg
- a = 0.75 m/s²
Therefore,
<u>a = 187.5 N</u>
<u></u>
e)
Here,
- F = ?
- m = 140 kg
- a = 2 m/s²
Therefore,
<u>a = 280 N</u>
<u></u>
Learn more about Newton's Second Law of motion here:
We use kinematic equation of motion,
Here, s is distance traveled, u is the initial velocity, t is time taken and g is acceleration due to gravity.
Given, .
We take, because stone has no initial velocity.
Therefore,
Thus, the height of cliff is approximately 61.75 m.