Answer:
<em>Digital clock is the most precised one</em>
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Explanation:
Explanation:
Given
Refractive Index 

angle of incident
Light originates in the medium of higher refractive index
Let
and
be the incident and refraction angles respectively thus according to snell's law




(b)Ray originates from lighter medium



Weight of motorcycle on the moon = mg
Here, g= 1.622 m/s²
So, W = 250 * 1.622 = 405.5 Kgm/s² = 405.5 N.
Did you understand??
Answer:
instantaneous speed: The instantaneous speed is the speed of an object at a particular moment in time. And if you include the direction with that speed, you get the instantaneous velocity. In other words, eight meters per second to the right was the instantaneously velocity of this person at that particular moment in time.
velocity: the speed of something in a given direction.
acceleration: a vehicle's capacity to gain speed within a short time.
solve problems: Problem solving consists of using generic or ad hoc methods in an orderly manner to find solutions to problems.
Explanation:
Answer:
Explanation:
Reaction force of inclined surface
R = mgcos30
=60 x 9.8 x .866
= 509 N
Force of kinetic friction
= .12 x 509
= 61.08 N
b )
net force downwards = mgsinθ - μmgcosθ
acceleration = g sinθ - μgcosθ
9.8 sin30 - .12 x 9.8 x cos30
= 4.9 - 1.018
a= 3.88 m /s²
c )
v² = 2as
= 2 x 3.88 x 20
v = 12.46 m /s