Four forces are being applied to move an object to the left. force 1 is pushing to the right at 200 n. force 2 is pushing to the left at 500 n. force 3 is pushing to the right at 100 n. force 4 is pushing to the left at 50 n. what's the net force acting on this object? a. 0 n b. 650 n c. 250 n d. 850 n

The answer would be C. 250N.

Net force is defined as the sum of all forces acting on an object. But you need to take into account, the direction of the forces. All forces going to the right is usually positive, and those on going to the left is negative. Let's take your problem into account:

F1 = 200 N to the right (positive)

F2 = 500N to the left (negative)

F3 = 100 N to the right (positive)

F4 = 50 N to the left (negative)

Fnet = F1 + F2 + F3 + F4

Put in what you know with the proper sign:

Fnet = F1 + F2 + F3 + F4

Fnet = 200N +(-500N) + 100N + (-50N)

Fnet = 200N +(-500N) + 100N + (-50N)

Fnet = (-300N) + 100N + (-50N)

Fnet = (-200N) + (-50N)

Fnet = -250 N

Because the sign of the result is negative, we know that the force is to the left. So your final answer would be:

250N to the left

d concave shape of wave rock

explanation:

the concave shape of wave rock is a very good evidence that supports the evolution of earth due to chemical weathering. if we talk about structure of   wave rock, studies have estimated that it is around 2.7 billion years old. it also serves as the foundation of evidence that it was the place where australian continent began to form.

how the structure of wave rock was created?

studies suggest that structure of wave rock was created when the surrounded area was started to weather due to which deposition of material started on the part of land which now contains wave rock.

the structure of wave rock is considered to be one of the best-known landforms in australia. at the height of around 15 cm, there can be found flared slopes which formulate the margins of hyden rock. it is now assumed by geologists that wave rock was created by subsurface water-induced weathering and not by glaciers, waves or wind.

due to deposition of material over the period of long time, the wave rock became tougher and tougher due to weathering from surrounding terrain. this makes it a physical evidence that supports   the evolution of earth due to chemical weathering.

hope it !