30 because v1 - v2 is 30 v1 is 40 v2 is 10
Answer:
g
Explanation:
if an object is thrown upward or at any angle, the acceleration acting on that object is the same as acceleration due to gravity which always acts towards the vertically downwards direction because there is no acceleration or the force acting on the object in horizontal direction.
Thus, the acceleration is same as acceleration due to gravity g.
<h2><u>Question</u><u>:</u><u>-</u></h2>
Ryan applied a force of 10N and moved a book 30 cm in the direction of the force. How much was the work done by Ryan?
<h2><u>Answer:</u><u>-</u></h2>
<h3>Given,</h3>
=> Force applied by Ryan = 10N
=> Distance covered by the book after applying force = 30 cm
<h3>And,</h3>
30 cm = 0.3 m (distance)
<h3>So,</h3>
=> Work done = Force × Distance
=> 10 × 0.3
=> 3 Joules
![\small \boxed{work \: done \: by \: Ryan \: = 3 \: Joules}](https://tex.z-dn.net/?f=%20%5Csmall%20%5Cboxed%7Bwork%20%5C%3A%20done%20%5C%3A%20%20by%20%5C%3A%20Ryan%20%5C%3A%20%20%3D%203%20%5C%3A%20Joules%7D)
Answer:
116 N.
Explanation:
Given,
mass of the ball, m = 0.145 Kg
initial speed = 0 m/s
Final speed = 40 m/s
time = 50 ms = 0.05 s
Force is equal to change in momentum per unit time
![F = \dfrac{m\Delta v}{\Delta t}](https://tex.z-dn.net/?f=F%20%3D%20%5Cdfrac%7Bm%5CDelta%20v%7D%7B%5CDelta%20t%7D)
![F = \dfrac{0.145(40-0)}{0.05}](https://tex.z-dn.net/?f=F%20%3D%20%5Cdfrac%7B0.145%2840-0%29%7D%7B0.05%7D)
F = 116 N
Force of the pitcher hand on the ball is equal to 116 N.
0.2 is the value of coefficient of friction (k)
F=kN
F=horizontal force
n=Normal Force
k=coefficient of friction
k=F/N
k=200/1000
k=0.2
The ratio of the normal force pushing two surfaces together to the frictional force preventing motion between them is known as the friction coefficient. Usually, the Greek letter mu is used to indicate it .N is the normal force, and F is the frictional force, hence F = N/N.
Due to the fact that both F and N are measured in units of force, the coefficient of friction has no dimensions (such as newtons or pounds). The coefficient of friction can have a variety of values for both static and dynamic friction. Static friction occurs when an object encounters friction that resists any applied force, keeping the object at rest until the static frictional force is released. In kinetic friction, the frictional force resists the motion of the object.
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