4. A block system is shown in figure. Frictional force on 2kg is f1 and on 3kg is f2 and T is tension in the string connecting block A and B. Which of the following statement is correct? (A) f1= 8i, f2 = -15icap, t=2n
(B)f1=-8icap, f2=-15icap, t=2n
(c)f1=5icap, f2=-15icap, t=5n
(d)f1=-5icap, f2=-15icap, t=5n

Brutus, the dog, is pulling a bone to the left with a force of 20 n. lassie, another dog, is pulling a bone to the right with a force of 18n. what is the net force? a. b. c.

As you lift an 88 n box straight upward you produce a power of 72 w. what is the speed of the box?

Your physics assignment is to figure out a way to use electricity to launch a small 6.0-cm-long plastic drink stirrer. you decide that you'll charge the little plastic rod by rubbing it with fur, then hold it near a long, charged wire, as shown in figure p23.56 . when you let go, the electric force of the wire on the plastic rod will shoot it away. suppose you can uniformly charge the plastic stirrer to 10 nc and that the linear charge density of the long wire is 1.0 x10-7 c/m. what is the net electric force on the plastic stirrer if the end closest to the wire is 2.0 cm away?