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Q1. An air puck of mass 0.026 kg is tied to a string and authorized to revolve in a circle of radius 1.5 m on a frictionless horizontal surface. The other end of the string passes through a hole in the center of the surface, and a mass of 1.7 kg is tied to it, as shown. The suspended mass remains in equilibrium even as puck revolves on the surface. What is the magnitude of the force that maintains circular motion acting on puck?
Q2. A damped mass-spring system oscillates at 220 Hz. The time constant of the system is 2.0 s. At t = 0, amplitude of oscillation is 5.1 cm and the energy of the oscillating system is then 51 J.
a 26.5 kg boy slides down a steep slide at a water park that is 10.9 m long and angled 75 degrees above the ground. what is the magnitude of the boys acceleration as he travels down the slide
An astronaut's normal weight it 600 newtons. How much would she weigh while orbiting in a satellite at 12,000 kilometers [two earth radii] above the surface of Earth.
An alpha particle (a helium nucleus, containing 2 protons and 2 neutrons) starts out with kinetic energy of 9.9 MeV (9.9x106 eV), What is the final kinetic energy of the gold nucleus
A 1.0-kg block of ice is initially at 0°C. Heat is added to this system, and the entropy is increased by 357.1 J/K. How much of the ice melts
Water is drawn from a well in a bucket tied to the end of a rope whose other end wraps around a solid cylinder of mass 50 kg and diameter 25 cm. what is the angular acceleration of the 50-kg cylinder
A heat pump has a coefficient of performance of 3.85 and operates with a power consumption of 6.88 x 103 W. How much energy does it deliver into a home during 2 h of continuous operation
A digital cell phone emits a 1.9 GHz electromagnetic wave with total power 0.60 W. At a cell phone tower 2.0 km away: What is the energy of an individual photon
The length of a moving spaceship is 28.4 m according to an astronaut on the spaceship. what is the speed of the spaceship
A point charge q = -2.4 nC is initially at rest adjacent to the negative plate of a capacitor, What is the kinetic energy of the point charge just before it hits the positive plate
A potter's wheel having a radius 0.55m and a moment of inertia 12.5 kg·m2 is rotating freely at 55rev/min. The potter can stop the wheel in 6s by pressing a wet rag against the rim and exerting a radially inward force of 68 N.
A spherical shell has an outside radius of 2.6cm and an inside radius of a. The shell wall has uniform thickness and is made of a material with density 4.70g/ cm3. The space inside the shell is filled with a liquid having a density of 1.23g/cm3.
A girl and her bicycle have a total mass of 40 kg. At the top of the hill her speed is 5.0 m/s. what is her speed at the bottom
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