Recent content by C42711

I got the right answer now.:)

If a rocket-powered sled is accelerated to a speed of 444 m/s in 1.8s, then what is the distance that the sled travels? So, my given: vf= 444 m/s t= 1.8 s I don 't know what equation to use to find distance. I tried: d=vi+1/2*at2 , but that didn't work. I just really don't know what...

This does: d=vi+1/2*at2 but I didn't get the right answer with that either, I got .75:(

A feather is dropped on the moon from a height of 1.40 meters. The acceleration of gravity on the moon is 1.67 m/s2 Determine the time for the feather to fall to the surface of the moon. So, I wrote my given: d=1.4 m a= 1.67 m/s2 both initial and final velocity= 0 I know I am looking...

So I am looking for final velocity and it's not zero? If so, I got it to be .61 m/s, but that seems awfully low, so I don't know. I used this equation: vf= vi2+2*a*d

Okay, how is this? a) 8 s And then for b, I'm not sure what I'm looking for to be how fast. I would have thought velocity, but they gave me velocity, so that's not it. And it can't be acceleration because that's gravity. So I am confused on what I'm looking for.

Thank you so much! Highly appreciated.:)

A ball is thrown with an initial upwards velocity of 40.0 m/s. a)How long is it in the air? b)How fast is it going when it hits the ground? I decided my given was: vi= 40.0 m/s vf=0 m/s a= -9.8 m/s2 I solved for time and distance using the big four and for a)4s b)81.6m Is this...

A chipmunk drops an acorn from a branch 6.0 m above the ground. a) How long is it in the air? b)How fast is it going when it hits the ground? I decided my given was a=9.8m/s2 d= 6.0 m vi= 0 m/s So I used the distance formula (d=vi+1/2*a*t2) and solved for time. I got about 1.1 s. For the next...

Homework Statement I am looking for an angle, using Law of Cosines. I am trying to solve for C. Homework Equations R^2= a^2+b^2- (2 X a X b X cos C) The Attempt at a Solution These are the numbers I am using, plugged into the Law of Cosines: 80^2= 450^2+ 373^2-(2 X 450 X 373 X...

Homework Statement A boat is placed in a river, which has a current velocity, Vc of 3.0 km/h east, relative to the shore. Relative to the river, the rower can maintain a boat speed, Vb of 6.0 km/h. A) Draw a diagram that could be used to find the boat's velocity relative to the shore if...

I am having a lot of trouble with my homework. If anyone could help me, it would be much appreciated. The Smith's go on vacation. They travel 16.0 km north/west; then turn 27 degrees to the left and go 135 km; then 294 km south/west. What is their displacement from home? So I found the X...

I just redid the problem and got the X component to be 69, not -347. Then I got my final displacement to be -139, but I don't know. I am so lost.

I got this as my final triangle, but I don't know how to go about finding an angle. I also don't understand why it isn't negative when they were traveling to the left and down. I'm sorry, I'm really trying, just having a lot of trouble...

I'm sorry, I am really having trouble with this. I may have gotten it, would the final displacement be -380 km?