Question

A web page designer creates an animation in which a dot on a computer screen has a position of r⃗  =[ 4.5 cm +( 2.1 cm/s2 )t2]i^+( 4.6 cm/s )tj^ .

1- Find the average velocity of the dot between t=0 and t=2.0s.

2- Find the instantaneous velocity at t=0.

3- Find the instantaneous velocity at t=1.0s.

4- Find the instantaneous velocity at t=2.0s.

Answer 1