3. A particle moves in a circle of radius 1'0 cm at a speed
given by v = 2:0 t where v is in cm/s and t in seconds.
(a) Find the radial acceleration of the particle at t = ls.
(b) Find the tangential acceleration at t = 1 s. (c) Find
the magnitude of the acceleration at t = 1 s.
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Answer:
Explanation:
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Given :-
Radius = 1.0 cm
Velocity = 2t
To Find :-
The radial acceleration of the particle at t = 1 s
The tangential acceleration at t = 1 s
The magnitude of the acceleration at t = 1 s
Solution :-
We know that,
- u = Initial velocity
- r = Radius
- dv/dt = Volts per second increase or decrease
Given that,
Radius = 1.0 cm
Velocity = 2t
Solution I :
At t = 1s
Velocity of the particle, u
Radial acceleration of the particle at t
Substituting them, we get
Therefore, the radial acceleration of the particle at t = 1 s is 4 cm/s²
Solution II :
We know that,
Tangential acceleration at t
Therefore, the tangential acceleration of the particle at t = 1 s is 2 cm/s²
Solution III :
Magnitude of acceleration at t = 1 sec
Substituting their values, we get
Therefore, the magnitude of the acceleration at t = 1 s is √20 cm/s²
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