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1. A wheel of radius 0.2 m starts from rest at t = 0 and rotates with constant angular acceleration about its axis to an angular velocity of 12 rad/s at t = 3 s.What is the angular acceleration of the wheel?
(a) 4 rad/s2(b) 15 rad/s2(c) 7.2 rad/s2(d) 36 rad/s2(e) 1.33 rad/s22. How many revolutions does the wheel make during the period of acceleration?
(a) 2.9(b) 3.7(c) 1.5(d) 8.6(e) 6.93. At t = 1.5 s, what is the centripetal acceleration of a point on the rim of the wheel?
(a) 4 m/s2(b) 15 m/s2(c) 7.2 m/s2(d) 36 m/s2(e) 1.33 m/s2
An object, mass 1.48 kg, moves in a horizontal circle with a radius of 1.52m. The object has an intial velocity of 28.0 m s-1. If the kinetic coefficient of friction between object and surface is 0.382.
If the plates are 2 inches square (exactly), and the hair is between the two plates at one edge (as shown), the experimenter measures 18 fringes within a distance of 15 mm. The light source has a wavelength of 600 nm. What is the diameter of the s..
A positively charged particle of mass 7.60 10-8 kg is traveling due east with a speed of 40 m/s and enters a 0.39-T uniform magnetic field. compute the magnitude of the magnetic force acting on the particle
A 150 F capacitor charged initially to 0.31 mC is connected across a resistor, and 2.0 second later its charge has dropped to 0.21 mC. Evaluate what the resistance
A farsighted person has a near point of 77 cm rather than the normal 25 cm. What strength lens, in diopters, should be prescribed to correct this vision problem
A space station is to provide artificial gravity to support long-term stay of astronauts and cosmonauts. It is designed as a large wheel, with all the compartments in the rim, how long should the motor fire
An arrow is shot vertically upward and then 2.02 s later passes the top of a tree 41.3 m high. How much longer will the arrow travel upward, and how high will it go
A hand-pumped water gun is held level at a height of 0.61 m above the ground and fired. Find the gauge pressure of the water gun's reservoir at the instant when the gun is fired
Two different electrical devices have the same power consumption, but one is meant to be operated on 120-V AC and the other on 240-V AC. What is the ratio of their currents
A child (40 kilogram) stands on the edge of a stationary merry-go-round (uniform disk of radius 1.2 meter and mass 50 kilogram). Obtain the angular speed of merry- go-round after jump
a river with a water temperature T(L)=20 degree C is to be used as the low temperature reservoir of a large power plant, what is the largest electrical output that the plant can deliver to its customers
A 235 kilogram merry-go-round in the shape of a uniform, solid, horizontal disk of radius 1.50 meter is set in motion by wrapping a rope about the rim of the disk and pulling on the rope. Find what constant force would have to be exerted
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