Answer: 17.14 m/s
Explanation:
We can solve this problem applying the Conservation of Mechanical energy (which is the sum of the kinetic energy and potential energy ), where the total initial mechanical energy must be equal to the total final mechanical energy :
(1)
Being:
(2)
(3)
Where:
is the mass of the object
is the initial velocity (the object was at rest)
is the acceleration due gravity
is the object's initial height or position
is the final velocity
is the object's final height or position
Solving and applying the given conditions:
(4)
(5)
Finding :
(6)
(7)
Finally:
Answer:
option A
Explanation:
given,
light is incident on the plane surface at (i) = 55°
angle of refraction (r) = 37°
μ is the refractive index of the material
using Snell's law
The refractive index of the material is
hence, the correct answer is option A
60 minutes = 1h
500/x = 10/100
She swam 5 kilometers per hour.
Answer:
Because the different waves will feel like to bounce off to different directions, and different items will do different actions.
Answer:
The speed of the particle is 2.86 m/s
Explanation:
Given;
radius of the circular path, r = 2.0 m
tangential acceleration, = 4.4 m/s²
total magnitude of the acceleration, a = 6.0 m/s²
Total acceleration is the vector sum of tangential acceleration and radial acceleration
where;
is the radial acceleration
The radial acceleration relates to speed of particle in the following equations;
where;
v is the speed of the particle
Therefore, the speed of the particle is 2.86 m/s