Question

A particle is oscillating according to the equation
x = 7 cos 0.5 πt, where t is in second. The particle moves from the position of equilibrium to maximum displacement in time –

• A. 0.5 s
• B. 4.0 s
• C. 2.0 s
• D. 1.0 s

Answer 1

Answer: (D)

1.0 s

Answer 2

ω = 0.5 π = $\frac{\pi}{2}$, $\frac{2\pi}{T} = \frac{\pi}{2}$ or T = 4s.

t = $\frac{T}{4} = \frac{4}{4}$s = 1s.