Classical Mechanics Answers

How may revolutions per minute must the body make about vertical axis so that the cord make an angle of 45 with the vertical

If a potential is given by ax^3+bx+c then what is the condition for equilibrium

A torque of 12 N m is applied to a solid, uniform puck of radius 0.50 m, causing the puck to accelerate at 5.7 rad/s2. What is the mass of the disk?

The following data were obtained in a refraction survey.

Distance(m) 0 5 10 15 20 25 30 35 40 45 50 55 60

Time(msecs) 11 22 32 37 38 41 42 41 41 42 42 43 44

(i) Plot the time-distance graph and

(ii) Calculate the depth to the refractor below the shot point.

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