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Q. A 120g ball on a 60cm long string is swung in a vertical circle about a point 200 cm above the floor. The tension in the string when the ball is at the very bottom of the circle is 6.1N . At the very bottom of the circle, a very sharp knife is suddenly inserted to cut the string directly below the point of support. How far to the right of where the string was cut does the ball hit the floor?
A 1300 N uniform boom is supported by a cable perpendicular to boom. The boom is hinged at the bottom, and a 2100N weight hangs from its top.
A lead fishing weight with a mass of 57.0g absorbs 146cal of heat. If its primary temperature is 50 C, what is its final temperature.
A cubical block of wood 10cm on a side, floats at the interface between oil and water with its lower surface 1.50 cm below the surface
A U tube is filled with water, and the two arms are capped. The tube is cylindrical, and the right arm has twice the radius of the left arm. The caps have negligible mass, are watertight, and can freely slide up and down tube.
If a disco disk is rotating with a person on it on the outer side, then if he moves inside (towards the center), the angular velocity will change-How will the energy be conserved.
If a 37.2N horizontal force must be applied to slide a 15.8kg box along the floor at constant velocity what is the coefficient of sliding friction between the two surfaces.
The intersection is 15 m wide. Her car's maximum deceleration is -5.20 m/s2, whereas it can accelerate from 44km/h to 70km/h in 7.8 s. overlook lengths of her car and her reaction time.
A rifle with the barrel length of 62cm fires a 12g bullet with a horizontal speed of 380m/s. The bullet strikes a block of wood and penetrates to a depth of 14cm. What resistive force (assumed to be constant) does the wood exert on the bullet? How lo..
Imagine that the coefficient of kinetic friction between a certain 15kg box and the floor is 0.35. How hard would you have to push on it to move it at the constant speed of 2.6m/s across the floor.
A bullet is fired horizontally from a 100 m, t all building with a speed of 900 m? How long will it take to hit the ground?
A 4.47 m long pole stands vertically in a lake having a depth of 2.22 m. while the sun is 62.6 degrees above the horizon, find the length of the pole's shadow on the bottom of the lake.
A glider of mass 1.00 kg is allowed to oscillate under the influence of a spring of spring constant 25.6 N/m while on a frictionless, horizontal air track. At t = 0 s glider is released from rest at x = 5.00 cm. (At equilibrium, the glider is at x = ..
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