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a 2100 lead sphere is hanging from a hook by a thin wire 390 long and is free to swing in a complete circle suddenly it
1 as structural steel rod has a radius r 95 mm and a length l 81 cm a force f 62 times 104 n about 7 tons stretches
a bat hits a moving baseball if the bat delivers a net eastward impulse of 13 n-s and the ball starts with an initial
a 6 n force acts on a 03-kg object for 03 seconds by how much does the objects momentum change in
high-speed stroboscopic photographs show that the head of a 250 g golf club travels at 600 ms just before it strikes a
a 570-kg skier starts from rest at the top of a ski slope of height 670a now moving horizontally the skier crosses a
how to solve this problem a 10 cm long animal tendon was found to stretch 38 mm by a force of 137 n the tendon was
a disk of radius 25 cm lies in a vertical plane and rotates with a constant angular acceleration of 500 radsec2 the
a shopper in a supermarket pushes a cart with a force of 27 n directed at an angle of 25deg below the horizontal the
an ideal transformer has 890 turns in its primary coil and 150 turns in its secondary coila if the primary coil draws
the athlete shown in the figure rotates a 100 kg discus along a circular path of radius 105 m the maximum speed of the
a ball swings in a vertical circle at the end of a rope 140 m long when the ball is 355deg past the lowest point on its
a circular wire of radius 567 cm has a current of 327 a flowing in it the wire is placed in a uniform magnetic field of
a student starting from rest slides down a water slide on the way down a kinetic frictional force a nonconservative
a horizontal vinyl record of radius 011 m rotates about a vertical axis through its center with an angular speed of 47
a trap door of length and width 275 m is held open at an angle of 650deg with respect to the floor a rope is attached
a 56 kg pole vaulter running at 12 ms vaults over the bar her speed when she is above the bar is 13 ms neglect air
uniform plate of height 1980 m is cut in the form of a parabolic sectionthe lower boundary of the plate is defined by y
a grinding wheel is initially at rest a constant external torque of 472 nmiddot m is applied to the wheel for 188 s
consider a simple plane pendulum consisting of mass m attached to a string of length l using the langranges
a battery has three cells connected in series each with an internal resistance of 0014omega and an emf of 200 v this
a current of 160 ma is maintained in a single circular loop with a circumference of 370 m a magnetic field of 0900 t is
a water balloon is launched from ground level with an initial velocity of 124 ms 270deg above the horizontal find how
if a 350 kg object is moving with constant velocity 22 ms due east then what is the magnitude of the net force acting
a 780-g bullet moving at 480 ms penetrates a tree trunk to a depth of 60 cma use work and energy considerations to find