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Q. A 16 kg wood ball hangs from a 2.0-m-long wire. The maximum tension the wire can withstand without breaking is 435 N. A 1.2 kg projectile traveling horizontally hits and embeds itself in the wood ball. What is the largest speed this projectile can have without causing the cable to break?
Q. Two small beads having positive charges 12q and q are fixed at the opposite ends of a horizontal insulating rod, extending from the origin (the location of the larger charge) to the point x = d. As shown in the figure below, a third small charged bead is free to slide on the rod. At what position is the third bead in equilibrium? Can this equilibrium be stable? If so when?
While standing on a bridge 45m above the ground, you drop a stone from rest. When the stone has fallen 4.90m, you throw a second stone straight down. What initial velocity should you give the second stone if they are both to reach the ground at th..
What is the minimum coefficient of friction that will prevent sliding. What should be the highest speed of the car so it can round the curve safely.
Evaluate the stability of of Na in the NaCl structure
After a tornado, a 0.55-g straw was found embedded 2.8 cm into the trunk of a tree. If the average force exerted on the straw by the tree was 70 N, what was speed of the straw when it hit the tree .
A helicopter is rising at 4.60 m/s when a bag of its cargo is dropped. The bag falls for 2.50 s. (suppose that the positive direction is upward.)
What is the velocity of the beam of electrons that go undeflected when passing during perpendicular electric and magnetic fields of magnitude 4700 V/m and 3.6×10-3 T, correspondingly.
A cube of ice is taken from the freezer at -9.4°C and placed in a 94 g aluminium calorimeter filled with 315 g of water at room temperature of 20°C. The final situation is observed to be all water at 19°C. What was the mass of ice cube.
If air drag is negligibly small, how fast is sequoia cone moving while it reaches the ground if it dropped from the top of a 114 tree.
What is the instantaneous power, at a time of 0.00700 seconds, dissipated by a 200 ohm resistor in a resonant AC circuit powered by a generator with a 21.0 V greatest potential difference operating at 5000 rad/s .
David is driving a steady 21.0 when he passes Tina, who is sitting in her car at rest. Tina begins to accelerate at a steady 2.70 at the instant when David passes. How far does Tina drive before passing David.
How does the decrease in gravitational potential energy of a falling ball compare to its increase in kinetic energy.
A series RLC circuit with L = 15 mH, C = 3.1 F, and R = 4.7 is driven by a generator with a maximum emf of 120 V and a variable angular frequency 8700. Find out phase angle (in degrees).
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