Recalculate 100 km/h to m/s
1 answer:
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Answer:
7.69km/hr due east
Explanation:
Given parameters:
Displacement due west = 3km
Displacement due east = 2km
Time taken = 8 minutes
Unknown:
Average velocity = ?
Solution:
Average velocity is the rate of change of displacement with time.
Velocity =
Displacement is deals with the start and the end;
Here, displacement = 3km - 2km = 1km due east
Time = 8min
60min = 1hr
8min = = 0.13hr
Average velocity = = 7.69km/hr due east
Answer:
Option (d)
The angular momentum of the system is 5 Kg-m²/s
Explanation:
Angular momentum: Angular momentum is the product of angular velocity and of moment of inertia.
Angular momentum is dented by L
And the unit of angular momentum is Kg-m²/s
L= I×ω
I is momentum of inertia
ω is angular velocity.
The unit of angular velocity is red/s.
Momentum of inertia : Momentum of inertia is the sum square the perpendicular distance from the rotational axis to of product mass of each particle of the body.
The S.I unit of momentum of inertia is kg-m²
The angular momentum of a system is:
L= ∑I ω
=∑ Mr²ω [ Since ]
Given , M= 1 kg, r₁=1 m , r₂= 2 m and ω = 1 rad/s.
The angular momentum of the system is
L= Mr₁²ω+Mr₂²ω
= Mω(r₁²+r₂²)
= {1×1 (1²+2²)}
=5 Kg-m²/s