Classical Mechanics Answers

A 1.00-g cork ball with charge 2.00 *C is

suspended vertically on a 0.500-m-long light string in the

presence of a uniform, downward-directed electric field of

magnitude E ! 1.00 & 105 N/C. If the ball is displaced

slightly from the vertical, it oscillates like a simple pendulum.

(a) Determine the period of this oscillation.

(b) Should gravity be included in the calculation for part

(a)? Explain.

the following molecules have polar covalent bonds EXCEPT?

Question #173223 in Physics

Given

Mass(a) = Mass(b)

V(a)1 = 6.2 m/s

V(a)2 = final velocity of the cue ball

V(b)1 = 0 m/s

V(b)2 = final velocity of the billiard ball

angle deflected of the billiard ball = 45° from the horizontal

x = angle deflected of the cue ball from the horizontal

6.2 m/s = (Va2){cos(x) + sin(x)}

In the x-direction

6.2 m/s + 0 m/s = (Va2)(cos x) + (Vb2)(cos 45)

The direction of the cue and billiard balls are the same because of the law of inertia.

In the y-direction

0 m/s + 0 m/s = (Va2)(sin x) + (-Vb2)(cos 45)

The final velocity of the billiard ball in the y-direction is negative because of the difference in the y-direction between the cue and billiard balls.

If we use substitution and elimination methods for two equations we can find 6.2 m/s = (Va2){cos(x) + sin(x)}.

However, I am having difficulty in the next sequence. In which part am I wrong? What is the solution? Do we have to use the formula of coefficient of restitution? I need your help. Thank you.

Before hanging new William Morris wallpaper in her bedroom, Brenda sanded the walls lightly to smooth out some

irregularities on the surface. The sanding block weighs 1.90 N and Brenda pushes on it with a force of 3.00 N at an angle

of 30.0° with respect to the vertical, and angled toward the wall.What is the coefficient of kinetic friction between the wall and the block?

A child of mass 30 kg slides from rest down a wooden pole by a distance of 3.0. calculate the average force of friction acting on the child if her speed is 2.0 when she hits the ground

Stuck in the middle of a frozen pond with only your physics book, you decide to put physics in action and throw the 5.00-kg book. If your mass is 62.0 kg and you throw the book at 13.0 m/s, how fast do you then slide across the ice? (Assume the absence of friction.)

Please tell me the explanation of the answer.

An airpalane is flying with a velocity of at an angle of above the horizontal.how far from the dog will suitcase land?

A Marvel comic character fires a missile, towards a DC Comic hero, the missile gets splitted into three fragments. Two fragments each of mass 100 kg, move away from each other making an angle of 120", with a speed of 200 m/s. Find the velocity of the last fragment having, mass of 200 kg. Also calculate Energy released in the process.

Scleronomous constraints are

A bowling ball with a mass of 15.0 kg is rolling down a hill that is inclined at an angle of 16 degrees. The coefficient of kinetic friction between the ball and the grass is 0.10. Calculate the velocity of the bowling ball obtained after 8 seconds and the distance travelled during that 8 seconds.