Apet-store supply truck moves at 25.0 m/s north along a highway. inside, a dog moves at 1.75 m/s at an angle of 35.0 degrees east of north. what is the velocity of the dog relative to the road?
i did all of my math, but i somehow got a negative number for the resultant vector, but if i'm not mistaken, the resultant vector is going in a positive direction, so something is not adding i guess the only thing i need with is figuring out what angle i'm supposed to use for the law of cosine formula?

Acar drives toward the right over the top of a hill, as shown below. which arrow represents the centripetal acceleration? w x y z

What is the angular momentum of the bar about the axle?

As part of your daily workout, you lie on your back and push with your feet against a platform attached to two stiff springs arranged side by side so that they are parallel to each other. when you push the platform, you compress the springs. you do an amount of work of 79.0 j when you compress the springs a distance of 0.230 m from their uncompressed length. (a) what magnitude of force must you apply to hold the platform in this position? (b)how much additional work must you do to move the platform a distance 0.230 m farther? (c) what maximum force must you apply to move the platform a distance 0.230 m farther?