A pulley is driven by a belt moving at a speed of 15.7 feet per second. If the pulley is6 inches in diameter, approximate the angular velocity of the pulley in revolutions persecond.a. 0.83 rev/sec b. 7.5 rev/sec c. 10 rev/sec d. 63 rev/sec

1. 7 m 2. 13 ft. 32 ft. 13 m x° 3. 4. 10" 8 ft. 23 ft. 22" 5. 6. 16 m 8 mm 50 mm 28 m

A sign hangs from two wires. The left-hand wire makes an angle of 60° with the horizontal, and the magnitude of the tension in the wire is 362 N. The right-hand wire makes an angle of 45° with the horizontal. Calculate the mass of the sign, in kilograms, to two significant figures. (Take the magnitude of the acceleration due to gravity, g, to be 9.8m s-2.) The mass of the sign is kg (to 2 s.f.)

A rock is throw horizontally off a cliff.  After 3.0 seconds the velocity of the rock has an angle of 10° below the horizontal.  Determine the magnitude of the initial velocity of the rock.