# Physics

Two dogs pull horizontally on ropes attached to a post; the angle between the ropes is 65.0. Dog exerts a force of 256 and dog exerts a force of 344 .

A) Find the magnitude of the resultant force.

B) Find the angle the resultant force makes with dog 's rope.

You can do this graphically, it is easy. Or use the law of cosines.

F^2= F1^2 + F2^2 -2F1*F2*cosTheta

Now for the angle, but you did not specify which dog's rope. Draw the diagram.

F1, then at the tip of F1, put F2. You should be able to find the angle between F1 and the third side by the law of sines.

Or graphically, you measure it.

Thank you .. I answered (A) and it's 508 N

but I didn't understand how to answer (B) could u please explain more ? ..

And quistion (B) required the angle between the resultant and dog A's rope ..

1. 👍
2. 👎
3. 👁
1. for B) arctan(y component/x component)

1. 👍
2. 👎
2. this foormula F^2= F1^2 + F2^2 -2F1*F2*cosTheta is wrong there is no minus in it.
thx

1. 👍
2. 👎

## Similar Questions

1. ### PHYSICS

Two lifeguards pull on ropes attached to a raft. If they pull in the same direction, the raft experiences a net external force of 332 N to the right. If they pull in opposite directions, the raft experiences a net external force

2. ### Physics

A 40.0kg child is in a swing that is attached to ropes 2.00m long. Find the gravitational potential energy associated with the child relative to the child's lowest position under the following conditions: a) When the ropes are

3. ### Physics

Three people pull horizontally on ropes attached to a post, as shown in the figure.(Figure 1) The total force that they exert on the post is zero. One of them pulls directly north with F1 = 500 N . Another pulls with F2 = 400 N in

4. ### Math/Physics

A block-and-tackle pulley hoist is suspended in a warehouse by ropes of lengths 2 m and 3 m. The hoist weighs 340 N. The ropes, fastened at different heights, make angles of 50° and 38° with the horizontal. Find the tension in

1. ### physics

Three people attempt to haul a heavy sign to the roof of a building by using three ropes attached to the sign. Abby stands directly above the sign and pulls straight up on a rope. Eric and Kim stand on either side of Abby. Their

2. ### physics

A child's swing is held up by two ropes ties to a tree branch that hangs 13.0 degrees from the vertical. If the tension in each rope is 2.28 N, what is the combined forece (magnitude and direction) of the two ropes on the swing?

3. ### Physics

An 800N billboard worker stands on a 4m scaffold weighing 500N and supported by vertical ropes at each end. How far would the worker stand from one of the supporting ropes to produce a tension of 550N in that rope?

4. ### Physical Science ASAP

A child weighing 200 newtons is sitting in the center of a swing. the swing is supported evenly by two ropes, one on each side. what is the tension force in one of the ropes?

1. ### Physics

Two dogs pull horizontally on ropes attached to a post; the angle problem 1 between the ropes is 60.0 degrees. If dog A exerts a force of 270N and dog B exerts a force of 300N find the magnitude of the resultant force and the

2. ### Physics

A 50.0-kg person takes a nap in a backyard hammock. Both ropes supporting the hammock are at an angle of 15.0degrees above the horizontal. Find the tention of the ropes.

3. ### Physics

A) A 600 kg steel beam is supported by the two ropes shown in (Figure 1). Calculate the tension in the rope. Express your answer to two significant figures and include the appropriate units. B) The rope can support a maximum

4. ### Physics

Find the tension in each of the two ropes supporting a hammock if the first one is at an angle of 19.4° above the horizontal and the second is at an angle of 35.3° above the horizontal. The person sleeping in the hammock