For which pair of objects would adding the same amount of electrons to each object result in a decrease in the electric force? two positively charged objects
two negatively charged objects
two objects that have no charge
two objects that have opposite charges

no. dot product   =0 when vecs at right angles

80cm/s.

24cm/s.

53.3cm/s.

the speed of the cart after 3 seconds of low fan speed is ⇒ 54.0 cm/s.

the speed of the cart after 5 seconds of medium fan speed is ⇒ 120.0 cm/s.

the speed of the cart after 2 seconds of high fan speed is ⇒ 64.0 cm/s. 

just did the lab.