Number of results: 114,801
Hi, I am confused about physics, more specifically force. I know that the formula for force is: f=ma So what if an object traveling at constant speed (acc equals zero) collides with a wall? How would you calculate the force, since there is no acceleration? There IS force upon ...
Tuesday, June 28, 2005 at 8:10am by Ashley
A bullet is dropped into a river from a very high bridge. At the same time, another bullet is fired from a gun straight down towards the water. If air resistance is negligible, the acceleration of the bullets just before they strike the water A. is greater for the dropped ...
Sunday, September 10, 2006 at 2:09pm by JC
How would I find the acceleration of a car if it traveled 1.5 meters in one second? If it is accelerating at a constant rate with zero initial velocity, then use the formula X = (1/2) a t^2 and solve for the acceleration, a. X = 1.5 m, and t = 1 s. It could be not accelerating...
Friday, September 22, 2006 at 2:47am by anonymous
i dont know how to apply formula in physics questions...and tommorow is our periodical examination.. Well, it is too late to help you. I suggest a tutor twice a week, or you will surely fail. Discuss this with your parents quickly.
Tuesday, October 17, 2006 at 5:41am by miss sixty
Math, Geometry and Physics
An enemy ship is on the east side of a mountainous island. The enemy ship can maneuver to within 2500 meters of the 1800 meter high mountain peak and can shoot projectiles with an initial speed of 250m/sec. If western shoreline is horizontally 300 meters from the peak, what ...
Tuesday, January 16, 2007 at 10:40am by Bob
A 17 N horizontal force F pushes a block weighing 6.0 N against a vertical wall. The coefficient of static friction between the wall and the block is 0.68, and the coefficient of kinetic friction is 0.48. Assume that the block is not moving initially. Will the block move? In ...
Saturday, February 10, 2007 at 9:00pm by COFFEE
A square of edge length 19.0 cm is formed by four spheres of masses m1 = 6.00 g, m2 = 3.50 g, m3 = 1.00 g, and m4 = 6.00 g. In unit-vector notation, what is the net gravitational force from them on a central sphere with mass m5 = 2.20 g? _N i + _N j Physics - bobpursley, ...
Thursday, February 15, 2007 at 5:38am by winterWX
is this the strutual formula for hydrogen cyanide H:C:::N and is this correct for cyanogen :N:::C:C:::N any advice woulds be appreciated This is more chemistry than physics. It is important to put the subject line carefully in order for the right people to look at the problem...
Sunday, February 18, 2007 at 12:38pm by bex
Physics - KE/inertia
The rigid body shown in Figure 10-66 (it is a triangle with the upper mass = to M and the bottom two corners/masses equal to 2M. The bottom side length equals .70 cm with point P in the middle of the side and the other two sides equal .55 cm)consists of three particles ...
Tuesday, March 27, 2007 at 6:08pm by COFFEE
Physics, still don't get it!
Suppose a monatomic ideal gas is contained within a vertical cylinder that is fitted with a movable piston. The piston is frictionless and has a negligible mass. The area of the piston is 3.06 10-2 m2, and the pressure outside the cylinder is 1.02 105 Pa. Heat (2109 J) is ...
Wednesday, April 18, 2007 at 10:30pm by Mary
Physics- drwls please check
Good morning. This is a repost. The system is telling me my calculations is incorrect. I thought a fresh pair of eyes would help. Suppose a monatomic ideal gas is contained within a vertical cylinder that is fitted with a movable piston. The piston is frictionless and has a ...
Thursday, April 19, 2007 at 9:06am by Mary
Two radio antennas simultaneously transmit identical signals with a wavelength of 3.35 m. A radio several miles away in a car traveling parallel to the straight line between the antennas receives the signlas. If the second maximum is located at an angle of 1.28 degrees north ...
Thursday, April 19, 2007 at 9:24pm by anonymous
Physics repost please check
Good morning. This is a repost. The system is telling me my calculations is incorrect. I thought a fresh pair of eyes would help. Please tell me what I am doing wrong. Suppose a monatomic ideal gas is contained within a vertical cylinder that is fitted with a movable piston. ...
Friday, April 20, 2007 at 2:48am by Mary
How much force is needed to accelerate a 50-kg rider and her 250-kg motorcycle at 5 m/s2? This is really a physics question. The equation that you use is Newton's second law, Force = Mass x Acceleration. In this case, the total mass being accelerated is 300 kg. Multiply that ...
Tuesday, June 12, 2007 at 11:10am by kent
Physics please clarify
A charge of +2q is fixed to one corner of a square, while a charge of -3q is fixed to the diagonally opposite corner. Expressed in terms of q, what charge should be fixed to the center of the square, so the potential is zero at each of the two empty corners? For Further ...
Monday, September 3, 2007 at 12:40pm by Mary
I just need the formula. A 2.5 kg object is whirled in a vertical circle whose radius is 0.89 m. If the time of one revolution is 0.94 s, the magnitude of the tension in the string (assuming uniform speed) when it is at the top is
Wednesday, February 13, 2013 at 10:23pm by Eve
A string requires a 191.0 N force in order to break. A 1.75 kg mass is tied to this string and whirled in a vertical circle with a radius of 1.92 m. The maximum speed that this mass can be whirled without breaking the string is Again I just need the formula!
Wednesday, February 13, 2013 at 10:24pm by Eve
Centripetal force = M*V^2/R = 191 Newtons Solve for V, in units of m/s. V^2 = 209.6 m^2/s^2 V = 14.5 m/s
Wednesday, February 13, 2013 at 10:24pm by drwls
PHYSICS - formula?
Here is one of my questions from my physics study. It tells me the answer (35 J), but how do I find that answer? I would appreciate a formula or step by step calculation. Thanks! :) A 30 kg kid on rollerskates is moving 1 m/s. His brother pushes him with a force of 5 N. What ...
Tuesday, March 26, 2013 at 1:58pm by Anna
PHYSICS - formula?
What acceleration does the pushing impart? F=ma 5=30a a = 1/6 How long does it take to go 4m, starting at 1m/s? s = Vo t + 1/2 at^2 4 = t + 1/2 * 1/6 t^2 t^2 + 12t - 48 = 0 t = 4 What's the speed after 4 seconds? v = Vo+at = 1 + 1/6 * 4 = 5/3 What's the KE then? KE = 1/2 mv^2...
Tuesday, March 26, 2013 at 1:58pm by Steve