Answer:
Value of acceleration in each case is
Explanation:
According to newton's law :
...equation 1.
In the given case, Force by both the children - Friction force .
Putting value of F in equation 1.
Now, if friction force = 20 N.
Therefore,
Putting value of F and a in equation 1.
Hence , this is the required solution.
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Answer:
Explanation:
We want to find the initial speed of the ball.
To do this, we have to apply the formula for the time of flight of a projectile:
where θ = angle of flight
g = acceleration due to gravity
v0 = initial speed
Therefore, substituting the given values into the formula, we have that:
⇒ 2 × ×0.8910= 9.8 × 4.2
⇒
That is the initial speed of the ball.
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Conduction. is a transfer of energy by direct contact
The force that the spring exerts is 1.31 N.
<h3>What is Spring force?</h3>
- The displacement (compression or expansion) and force constant of the specific spring determine the spring's force.
- It always takes action to get mass back to where it should be for equilibrium.
- The force applied to the spring and the energy it has stored are shown in the formulas below:
F = kx
Where,
x = displacement in the spring
k = spring force constant
<h3>Calculation of spring force:</h3>
Given,
k = 8.75 n/m
x = 0.150 m
Force exerted by the spring, F = kx
putting the values,
F = 8.75 x 0.150
= 1.3125 N
Hence, the force that the spring exerts is 1.31 N.
Learn more about spring force here:
brainly.com/question/4291098
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