6. The drawing shows a boy with a bow and arrow. He is holding the arrow and
pulling it back.
string
bow
arrow
(a) Two horizontal forces act on the arrow. These are the force exerted by the
boy's hand and the force exerted by the string. The arrow is not moving.
The boy pulls the arrow with a force of 150 N. What is the size of the force
exerted by the string on the arrow?
N​

Which of the following describes something an engineer would probably do first when developing new technology meant to reduce ocean pollution? o a. evaluate the benefits and challenges of using certain chemicals to purify water. o b. research new scientific findings in regard to ocean cleanup. o c. identify the need to reduce ocean pollution. o d. research what has been done in the past to clean up oceanic oil residue.

Transfer chemicals from one location to another to weather objects. a-water b-physical weathering c-chemical weathering

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 740 n/m. it is initially at rest on an inclined plane that is at an angle of theta= 26 with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is uk = 0.17. in the initial position, where the spring is compressed by a distance of d = 0.16 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. the block's initial mechanical energy is 9.472 j. b. if the spring pushes the block up the incline, what distance l in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.