anybody good in physics?

[Sprite_TM]

anyone can solve this?

a 2kg wood box slides down a vertical wood wall while you push on it at a 45 degree angle. what magnitude of force should you apply to cause the box to slide down at a constant speed?

http://www.geocities.com/tsdcus/phy1.JPG
i got 27.7N but the book says 23.1N...

an archer standing on a 15 degree slope shoots an arrow 20 degree above the horizontal. how far down the slope does the arrow hit if it is shot with speed of 50m/s

http://www.geocities.com/tsdcus/phy2.JPG
a rocket powered hockey puck has a thurst of 2.0N and a total mass of 1kg. it is released form a rest on a friciotnless table, 4m from edge of a 2m drop. the fornt of the rocket is pointed directly toward the edge. how far does the puck land from the base of the table?

i got 136m but book says 296m..

[j1mmay]

lol first year at utsc?

[MrDisco]

i charge $50 to answer each homework question.

[nazarbayev1129]

i charge $50 to answer each homework question.
guaranteed either right or wrong.

[Richard--X]

Wow.....just reading the questions is confusing me. Good luck.

[CanadaBoy]

Derek should make a homework help forum, or ban homework help

[CodecX81]

I vote for the latter.

Except, I sometimes ask questions related to technology and it sometimes crosses over into the realm of either work or school related.

/gonna shut up now.

[Sprite_TM]

lol so is anyone good in physics that is able to solve the problem correctly?

the second one i got 165m.

[Asun]

a 2kg wood box slides down a vertical wood wall while you push on it at a 45 degree angle. what magnitude of force should you apply to cause the box to slide down at a constant speed?

Not enough information. Is there any friction between box and wall?

[Sprite_TM]

the question doesnt say there's friction so i guess no, i'll takea pic

[Electricute]

i cuould solve them both, but im really lazy and still gotta work on my thesis, just use all the formulas you can set a=0 (constant V) so if a =0 F = 0 balh blah blah sub in and solve

no motivation here



basically question 1, im assuming no frictiion force because non was giving, therfore u only have the gravitational force, and the applied force (verticle) total horizontal force is zero beucase the wall pushes back, so you need g - Fcos45 =0

total force = 0 means no accelration = constant velocity

draw a free body diagram to help

[najibs]

OMFG...not another homework question! :mad:

[Quan]

OMFG...not another homework question! :mad:

Physics homework FTW!

[Firestorm ZERO]

hey I remember that book from high school. Luckly my teacher even gave out the cd version of the book so I didn't had to lug that thing around :D

[MrDisco]

a 2kg wood box slides down a vertical wood wall while you push on it at a 45 degree angle. what magnitude of force should you apply to cause the box to slide down at a constant speed?

i got 27.7N but the book says 23.1N...


yeah i'm going to say that you're forgetting to factor in friction with wood against wood...

[trixstar]

Ask Curtis!!