Home > Question > The time taken by a block of wood (...
Question

# The time taken by a block of wood (initially at rest) to slide down a smooth inclined plane 9.8 m long (angle of inclination is 30°) is

JEE/Engineering Exams
Physics
Solution
156
5.0 (1 ratings)

( Rightarrow S=u t+frac{1}{2} a^{2} )
( Rightarrow 9.8=0+frac{1}{2} times g times sin 30 t^{2} )
( Rightarrow 9.8=frac{1}{2} times 98 times frac{1}{2} times t^{2} )
( Rightarrow 1=frac{1}{4} times t^{2} )
( Rightarrow 4=t^{2} )
( therefore t=2 sec )