An electrons acceleration. Please check my answer!
Multiple-Concept Example 3 provides some pertinent background for this problem. Suppose a single electron orbits about a nucleus containing two protons (+2e), as would be the case for a helium atom from which one of the naturally occurring...
A 184-kg crate is being pushed across a horizontal floor by a force P that makes an angle of 15.2 ° below the horizontal. The coefficient of kinetic friction is 0.264. What should be the magnitude of P, so that the net work done by it and the kinetic frictional force is zero?
Ok so this is...
Tension question. PLEASE HELP! I have a test tmw!
In the drawing, the rope and the pulleys are massless, and there is no friction. Find (a) the tension in the rope and (b) the acceleration of the 10.0-kg block. (Hint: The larger mass moves twice as far as the smaller mass.)I know the answers...
I used the equation v= sq.rt. r*g*tan (theta)
So, my work for part a is...
sq. rt. (111)(9.8)tan(18.85) = 371.38.
The computer tells me that is the wrong answer...
Using that information I found the angle to be 18.85 degrees. And I found the answer to part (a) 371.38. But that answer is not correct.
Do you know what I did wrong? Any additional help?? Thank you...
On a banked race track, the smallest circular path on which cars can move has a radius of 111 m, while the largest has a radius of 157 m, as the drawing illustrates. The height of the outer wall is 15.7 m. Find (a) the smallest and (b) the largest speed at which cars can move on this track...
Could someone please help me? I would REALLY appreciate anything...
A person, sunbathing on a warm day, is lying horizontally on the deck of a boat. Her mass is 54.3 kg, and the coefficient of static friction between the deck and her is 0.708. Assume that she is moving horizontally, and that...
A marble is thrown horizontally with a speed of 23.4 m/s from the top of a building. When it strikes the ground, the marble has a velocity that makes an angle of 61.8 ° with the horizontal. From what height above the ground was the marble thrown?
So far I have found Ay= -9.8, Ax= 0, Vox=23.4...
I think I got it. Thanks.
But now I need help with...
A rocket is fired at a speed of 63.0 m/s from ground level, at an angle of 37.0 ° above the horizontal. The rocket is fired toward an 18.1-m high wall, which is located 32.0 m away. The rocket attains its launch speed in a negligibly...
Can someone PLEASE help me with this problem??
In a football game a kicker attempts a field goal. The ball remains in contact with the kicker's foot for 0.0300 s, during which time it experiences an acceleration of 229 m/s2. The ball is launched at an angle of 50.3 ° above the ground. Determine...