Answer:
Explanation:
Given:
- mass of the object on a horizontal surface,
- coefficient of static friction,
- coefficient of kinetic friction,
- horizontal force on the object,
<u>Now the value of limiting frictional force offered by the contact surface tending to have a relative motion under the effect of force:</u>
where:
normal force of reaction acting on the body= weight of the body
As we know that the frictional force acting on the body is always in the opposite direction:
So, the frictional force will not be at its maximum and will be equal in magnitude to the applied external force and hence the body will not move.
so, the frictional force will be:
Answer:
It always acurs after a 1st quarter
do you have photo?
Explanation:
Answer:
It will take t = 2.16 [s]
Explanation:
In order to solve this problem, we must find the final speed of the object when it is on the floor. The only way is to use the principle of energy conservation which tells us that potential energy can be transformed into kinetic energy and vice versa.
Now we can find the velocity
v² = 2*g*h
v = √2*9.81*23
v = 21.24 [m/s]
Now using the following equation:
where:
Vf = final velocity = 21.24 [m/s]
Vo = initial velocity = 0
g = gravity acceleration = 9.81 [m/s²]
t = time [s]
21.24 = 0 + (9.81*t)
t = 2.16 [s]
Answer: 1.2 seconds
Explanation:
Initial velocity =u=13.9m/s
Acceleration due to gravity=g=9.8m/s^2
Φ=25°
Time=t
T=(2 x u x sinΦ) ➗ g
T=(2 x 13.9 x sin25) ➗ 9.8
T=(2 x 13.9 x 0.4226) ➗ 9.8
T=11.75 ➗ 9.8
T=1.2 seconds
Number 16 is organ system
