System is shown in the figure. Velocity of sphere A is 9 m/s. Then speed of sphere B will be
9 m/s
12 m/s
9×54 m/s
None of these
V cos ϕ=9 cos θ
V=9×1215×159
=12 m/s
A point object is moving with velocity v0=10^i m/s along x-axis as shown in figure. Relative velocity of its image in mirror M1 with respect to mirror image velocity in M2 is :
(Take sin 37∘=0.6)
V = 1 - 4t if t<4
V= 5 - 2t if t >6
Find the value of v (m/s) when t = 7