Answer: The angle of inclination is nearly 30°
Explanation:
For a body on an inclined plane, the coefficient of friction between the body and the plane is equal to the ratio of the moving force applied to the body to the frictional force acting on the body.
If uK coefficient of friction;
Fm is the moving force
R is the normal reaction on the body
Mathematically uK = Fm/R
Fm = WSin(theta)
R = Wcos(theta)
uK = Wsin(theta)/Wcos(theta)
uK = tan(theta)
theta = arctan(uK)
If uK is 0.58
theta = arctan0.58
theta = 30°
The angle of the inclined will be 30°
Answer:
Speed of the boat, v = 4.31 m/s
Explanation:
Given that,
Height of the bridge, h = 32 m
The model boat is 11 m from the point of impact when the key was released, d = 11 m
Firstly, we will find the time needed for the boat to get in this position using second equation of motion as :
Here, u = 0 and a = g
t = 2.55 seconds
Let v is the speed of the boat. It can be calculated as :
v = 4.31 m/s
So, the speed of the boat is 4.31 m/s. Hence, this is the required solution.
Answer:
Explanation:
q = Charge in the potassium ion =
e = Charge of electron =
= Change in potential =
Change in electric potential is given by
The energy is
Work = (force) x (distance)
To lift each baby, force = 90N,
distance = 1.0 something, let's say 1.0 meter .
Work to lift each baby = (90N) x (1.0 meter) = 90 joules.
Work to lift both of them = 2 x 90 joules = 180 joules.
Kinetic energy = 1/2 * m * V^2
K = 1/2 * 2kg * 4