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winterWX
Questions (31)
Posted by winterWX on Monday, March 19, 2007 at 11:54pm.
A small block of mass m = 4.0 kg can slide along the frictionless
1 answer
594 views
Posted by winterWX on Monday, March 19, 2007 at 11:51pm.
A 2600 kg truck traveling north at 38 km/hr turns east and accelerates
0 answers
915 views
A small block of mass m = 4.0 kg can slide along the frictionless loop-the-loop. The block is released from rest at point P, at
0 answers
790 views
A 2000 kg truck traveling north at 38 km/hr turns east and accelerates to 55 km/hr. What is the change in the truck's kinetic
1 answer
969 views
The flywheel of a steam engine runs with a constant angular speed of 250 rev/min. When steam is shut off, the friction of the
0 answers
668 views
The flywheel of a steam engine runs with a constant angular speed of 250 rev/min. When steam is shut off, the friction of the
1 answer
876 views
A disk rotates about its central axis starting from rest and accelerates with constant angular acceleration. At one time it is
0 answers
765 views
A disk rotates about its central axis starting from rest and accelerates with constant angular acceleration. At one time it is
0 answers
847 views
The angular position of a point on the rim of a rotating wheel is given by = 4.0t - 1.0t2 + t3, where is in radians and t is in
0 answers
1,076 views
A 0.30-kg softball has a velocity of 12 m/s at an angle of 30° below the horizontal just before making contact with the bat.
1 answer
4,730 views
A 0.30-kg softball has a velocity of 12 m/s at an angle of 30° below the horizontal just before making contact with the bat.
0 answers
985 views
An old Chrysler with mass 1900 kg is moving along a straight stretch of road at 48 km/h. It is followed by a Ford with mass 1500
1 answer
1,348 views
A 5.60-kg particle has the xy coordinates (-1.20 m, 0.500 m), and a 5.20-kg particle has the xy coordinates (0.600 m, -0.750 m).
0 answers
753 views
A 21.0-kg satellite has a circular orbit with a period of 2.37 h and a radius of 8.50×106 m around a planet of unknown mass. If
1 answer
651 views
What linear speed must an Earth satellite have to be in a circular orbit at an altitude of 186 km? What is the period of
0 answers
605 views
A 21.0-kg satellite has a circular orbit with a period of 2.37 h and a radius of 8.50×106 m around a planet of unknown mass. If
0 answers
774 views
A orbiting satellite stays over a certain spot on the equator of (rotating) Earth. What is the altitude of the orbit (called a
0 answers
1,227 views
What linear speed must an Earth satellite have to be in a circular orbit at an altitude of 186 km? What is the period of
1 answer
519 views
A star of mass 2.0 1028 kg that is 1.6 1020 m from the center of a galaxy revolves around that center once every 3.4 108 years.
1 answer
887 views
A square of edge length 19.0 cm is formed by four spheres of masses m1 = 6.00 g, m2 = 3.50 g, m3 = 1.00 g, and m4 = 6.00 g. In
0 answers
789 views
In 1956, Frank Lloyd Wright proposed the construction of a mile-high building in Chicago. Suppose the building had been
2 answers
1,474 views
A square of edge length 19.0 cm is formed by four spheres of masses m1 = 6.00 g, m2 = 3.50 g, m3 = 1.00 g, and m4 = 6.00 g. In
0 answers
635 views
A solid uniform sphere has a mass of 2.0 104 kg and a radius of 1.5 m. What is the magnitude of the gravitational force due to
0 answers
775 views
In 1956, Frank Lloyd Wright proposed the construction of a mile-high building in Chicago. Suppose the building had been
0 answers
981 views
After flying for 15 min in a wind blowing 42 km/h at an angle of 30° south of east, an airplane pilot is over a town that is 50
0 answers
699 views
A boy whirls a stone in a horizontal circle of radius 1.2 m and at height 2.0 m above ground level. The string breaks, and the
0 answers
633 views
A person walks up a stalled 20 m long escalator in 79 s. When standing on the same escalator, now moving, the person is carried
0 answers
650 views
A golf ball is struck at ground level. The speed of the golf ball as a function of the, where t = 0 at the instant the ball is
0 answers
1,023 views
The velocity v of a particle moving in the xy plane is given by v = (6.0t - 4.0t2) i + 4.0 j, with v in meters per second and t
1 answer
2,753 views
An electron's position is given by r = 4.00t i - 6.00t^2 j + 5.00 k, with t in seconds and r in meters. In unit-vector notation,
0 answers
835 views
A ball rolls horizontally off the edge of a tabletop that is 1.60 m high. It strikes the floor at a point 1.58 m horizontally
0 answers
806 views
