GENERAL KNOWLEDGE

GK

PHYSICS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What’s the period of a spring-mass oscillator with a mass of 3.5 kg and a spring constant of 85 N/m?
A
1.3 sec
B
1.9 sec
C
0.4 sec
D
0.8 sec
E
3.1 sec
Explanation: 

Detailed explanation-1: -Mass on a spring-Where a mass m attached to a spring with spring constant k, will oscillate with a period (T). Described by: T = 2√(m/k).

Detailed explanation-2: -time is called T, the period of oscillation, so that T = 2, or T = 2/. The reciprocal of the period, or the frequency f, in oscillations per second, is given by f = 1/T = /2.

Detailed explanation-3: -Spring-Mass System Differential Equation A body of mass m is pulled by a force F, which is equal to mg. The displacement on the spring is x0. So, the force acting on it will be F =-kx0.

Detailed explanation-4: -The solution to the harmonic oscillator equation is(14.11)x=A cos(t+)where A is the amplitude and is the initial phase.

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