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An unstrained horizontal spring has a length of 0.36 m and a spring constant of 290 N/m. Two small charged objects are attached to this spring, one at each end. The charges on the objects have equal magnitudes. Because of these charges, the spring stretches by 0.037 m relative to its unstrained length. Describe (1) the possible algebraic signs and (2) the magnitude of the charges.
An antitank weapon fires a 4kg rocket which acquires a speed of 50.0 m/s after travelling 90 cm down a launching tube. Assume the rocket was accelerated uniformly, what is the average force acted on it.
a small metal ball with a mass of 5.95 g and a charge of 5.31 mc is located at a distance of 0.63 m above the ground in
Suppose the space shuttle is in orbit 320km from the Earth's surface, and circles the Earth about once every90.9 minutes. Find the centripetal acceleration of the space shuttle in its orbit.
a small mailbag is released from a helicopter that is descending steadily at 1.50 ms. after 3.00 s answer the following
A driver travels 10 km east, 20 km north and 50 km in a direction 30 degrees south of west. What is the drivers average velocity if the trip takes 90 minutes
An object is placed 14.0 centimeter in front of a convex mirror, the image being 6.65 centimeter behind the mirror. Find how far in front of the mirror is the second object placed
A 300kg piano is being lowered into position by a crane while two people steady it with ropes pulling to the sides. What is the tension in the vertical main cable supporting the piano
An elevator cable breaks when a 975 kg elevator is 24.5 m above the top of a huge spring (k = 8.00 x 10^4 N/m) at the bottom of the shaft. Calculate the amount the spring compresses
Three equal positive charges Q are each fixed at a corner of an equiliateral triangle of side length a, Draw a free body diagram for the negative charge, Find the magnitudes of the net force on the negative charge
A box of mass 8.0 kilogram is accelerated from rest across a floor at a rate of 3.0 m/s for 6.0 s. Estimate what is the net work done on the box
The magnetic field B at the center of a circular coil of wire carrying a current I (as in fig. 20-9) is where N is the number of loops in the coild, determine the magnetic field strength at the center of the coil
question what is the maximum torque on a coil with a magnetic moment of 5.6 a.m2 when it is placed at an angle of 90
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