Projectile Motion
I've looked through all 3 of my physics textbooks and still don't get how to solve this problem. Please help.
At the highest point in its path, an arrow is traveling at a speed of 10 m/s. Assuming that its acceleration is 9.81 m/s^2 vertically downward, how fast would it be moving .5 s later? .5s earlier?
My attempt: I'm assuming that the 10 m/s is the horizontal vector part, so I did vf=vi + at with vi being 0 m/s but the answer is negative and doesn't match any of the answer choices even if it was positive.. And I can't think of another way to approach this problem..
Then, there are two more problems that are on the same topic, that I also don't know how to work them out:
At the highest point in its path, an arrow is traveling at a speed of 10 m/s. Assuming that its acceleration is 9.81 m/s2 vertically downward and .5 m/s in the horizontal direction opposite its motion, how fast will it be moving 2.0s later? 2.0s earlier?
Thanks!
At the highest point in its path, an arrow is traveling at a speed of 10 m/s. Assuming that its acceleration is 9.81 m/s^2 vertically downward, how fast would it be moving .5 s later? .5s earlier?
My attempt: I'm assuming that the 10 m/s is the horizontal vector part, so I did vf=vi + at with vi being 0 m/s but the answer is negative and doesn't match any of the answer choices even if it was positive.. And I can't think of another way to approach this problem..
Then, there are two more problems that are on the same topic, that I also don't know how to work them out:
At the highest point in its path, an arrow is traveling at a speed of 10 m/s. Assuming that its acceleration is 9.81 m/s2 vertically downward and .5 m/s in the horizontal direction opposite its motion, how fast will it be moving 2.0s later? 2.0s earlier?
Thanks!