To solve this problem, we need to determine the instantaneous power given the displacement function of a particle and the constant force applied.
Displacement Function: \( x(t) = 2t - 1 \)
Force: \( F = 5 \, \text{N} \)
1. Velocity Calculation: The instantaneous velocity \( v(t) \) is the derivative of the displacement function \( x(t) \) with respect to time \( t \).
\( v(t) = \frac{d}{dt}(2t - 1) = 2 \, \text{m/s} \)
2. Power Calculation: Instantaneous power \( P \) is given by the product of force and instantaneous velocity.
\( P = F \times v(t) \)
Substituting the given values:
\( P = 5 \, \text{N} \times 2 \, \text{m/s} = 10 \, \text{W} \)
Thus, the value of instantaneous power is 10 W.
A sphere of radius R is cut from a larger solid sphere of radius 2R as shown in the figure. The ratio of the moment of inertia of the smaller sphere to that of the rest part of the sphere about the Y-axis is :
The current passing through the battery in the given circuit, is:
A bob of heavy mass \(m\) is suspended by a light string of length \(l\). The bob is given a horizontal velocity \(v_0\) as shown in figure. If the string gets slack at some point P making an angle \( \theta \) from the horizontal, the ratio of the speed \(v\) of the bob at point P to its initial speed \(v_0\) is :