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A string under a tension of 49.0 N is used to whirl a rock in a horizontal circle of radius 2.40 m at a speed of 20.8 m/s on a frictionless surface as shown in the figure below. As the string is pulled in, the speed of the rock increases. When the string on the table is 1.00 m long and the speed of the rock is 52.0 m/s, the string breaks. What is the breaking strength, in newtons, of the string?
A ball of mass 1.024 g and positive charge q =40.3microC is suspended on a string of negligible mass in a uniform electric field. We observe that the ball hangs at an angle of theta=15.0o from the vertical. What is the magnitude of the electric field..
A proton accelerates from rest in a uniform electric field of 652 N/C. At some later time, its speed is 1.26 106 m/s. How far has it moved in that interval
Consider the system described in the example with m1 = 0.51 kg and m2 = 0.40 kg. If F is sufficiently large, it is clear that the block will accelerate to the right. Find the range of F that allows the system to remain at rest
Calculate the direction, magnitude and line of action of the vertical and horizontal components of hydrostatic force acting on a surface.
The aurora is caused when electrons and protons, moving in earth's magnetic field of 5x10^-5 T, collide with molecules of the atmosphere and cause them to glow. What is the radius of the circular orbit for (a) an electron with speed 1.0×10^6 and (b) ..
A football player carrying the ball runs straight ahead at the line of scrimmage and directly into a wall of defensive linemen. Find the magnitude and direction of his average acceleration
A 89.0 kg skydiver hanging from a parachute bounces up and down with a period of 1.50 s. What is the new period of oscillation when a second skydiver
a uniform stick 1.5 meters long With a massive 220 kg is pivoted at its center a 3.9 kg bullet is shot through the stick midway between the pivot, What is the angular speed of the spinning stick
Y You own an 800 kg 4WD truck and you decide to go help a friend who got stuck on a steep snowy mountain road in his 400 kg Porche. What is the acceleration of each vehicle
If a wind begins blowing from the southwest at a speed of 110km/h (average), calculate the velocity (magnitude) of the plane
Two sound sources driven in phase by the equal amplifier are d = 4 m apart on the y axis. At a point a very large distance from the y axis, constructive interference is first heard at an angle θ1 = 0.140 rad with the x axis.
An unstable particle at rest breaks up into two fragments of unequal mass. The mass of the lighter fragment is equal to 2.70 multiply.gif 10-28 kg, what is the speed of the heavier fragment
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