Recent content by Teenytiny1991

Homework Statement A roller coaster vehicle has a mass of 500 kg when fully loaded with passengers. a) if the vehicle has a speed of 20.0 m/s at point A, what is the force of the track on the vehicle at this point (point a sits at the bottom of a drop of the roller coaster where the radius is...

the y forces equal zero because nothing is acting upon the boat in either the y or -y way. and to be honest the only reason i said EFx is equal to zero is because I was setting the equation equal to zero. as habit. I'm not sure why the X forces would equal zero. And the accellaration of the...

does it mean there is no net force. so does that mean it would be zero?

P= person by the way =)

I don't know how to draw on here but here are my calculations EFy=0=860sin22-Psin75 0=322.16-.966P -322.16=-.966P T=333.53N EFx=0=860cos22+333.53cos75 797.38+86.32 Fr=883.7 Then i did pythagorean theorom to add the two vectors. Sorr i misprinted my answer for C 883.7^2+333.53^2...

i have the work to go with them it w9ould just save me a lot of time if someone would just say yes or no. but if no one is willing to do that can you just wite on the post and tell me to post them so you can help me? please

Homework Statement A Pickup truck pulla a boat down a creek witha constant force of 860 N. A man helps steer the boatby pulling a rope from the opposite side of the creek. The man and the truck exert just enough force to keep the boat moving at a constant speed in the center of the creek. The...

So you are saying it doesn't matter which formula I use, because they both answer the same question. so it would be Fg= (5.98x10^24)((6.67x10^-11)=3.99x10^14

Homework Statement What is the value of g on the surface of the Earth in Newtons? Homework Equations Fg=G M1M2/R^2 SumF=ma I'm not sure which formula to use? The Attempt at a Solution i think its (9.80m/s^2)(5.98x10^24)= 5.8604e25 (what does the e on my calculator mean, is this...

I'm sorry, what do you mean. 40 mi/h x 1h/60min x 1min/60 sec x 1609m/ 1 mi = 17.87777778 m/s but since there is only one sig fig i rounded it up to twnety. is that not how i should have gone about converting it?

Homework Statement A car accelerates uniformly from rest to a speed of 40 mi/h in 12.0 secs find A) the distance the car traveled during this time and B) the constant accelaration of the car Homework Equations a) Displacement of an object as a function of time: delta x =1/2(v0+v)T B)...

Homework Statement A camero runs a red light and hits an suv directly behind where a tv news crew is filming. from the sound of the dqueling tires recorded on film, the police can tell that the driver applied his breaks for exactly 1.69 secs. a csi team review the clip and determines the care...

Homework Statement Estimate to 1 significant figure the total # of air molecules in this room (l=20ft, w=14ft, H= 8ft) Find molecules/room Homework Equations 1 mole = 22.4 liters 6.02 x 10^23 molecules = 1 mole The Attempt at a Solution volume of room = 2240 ft^3 or approx 683...

Homework Statement A furlong is and old British unit of length equal to 0.125 mi, derived from the length of a furrow in an acre of plowed land. A fortnight is a unit of time corresponding to two weeks, or 14 days and nights. Find the speed of light in megafurlongs per fortnight. (one...