Which example illustrates Newton's second law? A. More mass is added to a wheelbarrow, and a larger force is
required to move it.
B. The force of a wheelbarrow on the ground is equal to the force of
the ground on the wheelbarrow.
C. A person pushes a wheelbarrow, causing it to move forward.
D. A wheelbarrow remains stationary when no one pushes on it.

c. A person pushes a wheelbarrow,causing it to move forward.

Explanation:Much less force is required to push an empty shopping cart than a full shopping cart. When a car driver has to brake suddenly, all passengers continue moving forward unless restrained by the seatbelt. A balloon flies in the opposite direction as the air that's rushing out of it.

explanation:

v=uf/(u-f)

= 5.-10/(5+10) convex lens has negative focal length

trig 15.3 cos