Question

a pendulum Bob has a speed of 3 m/s- at it's lowest position.tge pendulum is 0.5 m long .the speed of the Bob when the length makes an angle of 60° to the vertical will be
a) 3m/s -
b) 1/3 m/s -
c) 1/2 m/s-
d) 2 m/s-

Answer 1

answer: d

reason:
1/2m v square+ mgl(1-cos theta )= 1/2 MV square
or v square+ 2 gl( 1- cos theta )= v square
or
v square+2 ×10×0.5(1-1/2)=9
or
v square=9-5=4
v = 2 m/ s inverse

hope it may help u

# be brainly

Answer 2

Ahoy!

Refer to the attachment