A block of mass 5 kg starting from rest pulled up on a smooth incline plane making an angle of 30 ° with horizontal with an effective acceleration of 1 m s - 2 . The power delivered by the puling force at t = 10 s from the start is _____ W . [Use g = 10 m s - 2 ] (Calculate the nearest integer value)

Step-by-step solution

Let's consider the following free-body diagram: From the above diagram, it can be written that F - m g sin 30 ° = m a       . . . 1 Substitute the values of the known parameters into equation (1) and solve to calculate the force applied on the block. F - 50   sin 30 ° = 5 × 1 ⇒ F = 5 + 25   N = 30   N The velocity of the block v at t = 10   s can be written as v = 0 + 1   m   s - 2 × 10   s = 10   m   s - 1 Hence, the required