<span>B) eye color is an inheritable trait</span>
<span> The indivisibility of an atom was proved wrong an atom can be further subdivided into protons, neutrons and electrons. However an atom is the smallest particle that takes </span>part<span> in chemical reactions</span>
The water skier being pulled right by boat. Tension acting in the string of magnitude 490 N at an angle of 13°. The weight of the skier, mg would act downwards. ( <em>m</em> = 49 kg , mass of the skier and g = 9.8 m/s² acceleration due to gravity ). The frictional force, <em>f</em> would act in the opposite direction of motion. The normal force (reaction force) would act in the upward direction.
Free body diagram is attached below.
Answer:
Explanation:
Given:
mass of disk,
radius of the disk,
time taken by the disk to complete on rotation,
<u>We know that rotational kinetic energy is given as:</u>
............................(1)
Now the angular speed of the disk:
<u>The moment of inertia of a disk is given as:</u>
Now using eq. (1):
Answer:
Explanation:
distance travelled
s = 2πR
= 2 X 3.14 X 140
= 880 m
final velocity = v
initial velocity = u
distance travelled = s
time = 60 s
s = ut + 1/2 at²
880 = .5 x a x 60²
a = .244 m/s²
final velocity v = at
= .244 x 60
= 14.66
centripetal acceleration at final moment
v² /R
14.66 X 14.66 / 140
= 1.53 m/s⁻²
1.53 m/s²
this is centripetal acceleration which acts towards the centre.
tangential acceleration calculated a _t = .244
redial acceleration ( centripetal ) = 1.53
Resultant acceleration
R²= 1.53² + .244 ²
R = 1.55 m/s²
total force = 1.55 x 76
= 118 N