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A blu-ray disc has mass of 20 g and is 12 cm in diameter. The fastest drives can spin the disc at 10000 RPM after uniformly accelerating it for 1 sec. Find the net torque on the disc. You may assume that the disc is a uniform solid cylinder.
A semi-trailer is coasting downhill along a mountain highway when its brakes fail. What was the truck's initial speed
A car of mass M = 1100 kg traveling at 45 km/hour enters a banked turn covered with ice. The road is banked at an angle theta, and there is no friction between the road and the car's tires.
A dentist's drill starts from rest. After 2.90 s of constant angular acceleration it turns at a rate of 2.2 104 rev/min. Find the drill's angular acceleration
A converging lens(f1=4 cm) is located 8 cm to the left of a diverging lens (f2= -2 cm). Find the final image formed by the 2 lens system
A spring with a constant of 32 N/m is placed on a horizontal smooth surface and a mass of 2.3 kg is pushed against it. What is the velocity of the mass as it leaves contact with the spring
A student of mass 33.5 kg wants to measure the mass of a playground merry-go-round, which consists of a solid metal disk of radius R = 1.50 m that is mounted in a horizontal position on a low-friction axle.
You measure an electric field of 1.37×106N/C at a distance of 0.159m from a point charge. What is the electric flux through the surface of a sphere
A 53.0 kg cheerleader uses an oil-filled hydraulic lift to hold four 130 kg football players at a height of 1.30m. what is the diameter of the football players' piston
The flywheel of a steam engine begins to rotate from rest with a constant angular acceleration of 1.43 rad/s2. It accelerates for 31.5 s, then maintains a constant angular velocity
What is the maximum wavelength seen in each of the Lyman, Balmer, Paschen, and Brackett, and Pfund series for hydrogen? (122, 656, 1880, 4050, 7470 nm)?
Doug uses a 29 horizontal force to push a 3.5 crate up a 1.5 -high, 20 frictionless slope. What is the speed of the crate at the top of the slope
Use Newton law to determine the force applied to the backrest when a 150-lb person leans 40% of his or her body weight against it. Determine the constant requiered for the spring
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