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A force F= (6x - 2y)N acts on a particle that undergoes a displacement delta r= (3x + y)m. Find (a) the work done by the force on the particle and (b) the angle between F and r.
How many J of energy must be removed when 156 g of steam, at a temperature of 175.0 °C, is cooled and frozen into 156 g of ice at 0 °C.
A 78 kg circus performer jumps from a 4.20 m height onto a trampoline and stretches it downward 0.3m. suppose that the trampoline obeys Hooke's law.
At a distance r1 from a point charge, magnitude of the electric field created by the charge is 296 N/C. At a distance r2 from the charge, the field has a magnitude of 168 N/C. Find the ratior2/r1.
Some air is flowing from a wider tube to narrower. There is a difference in height of the liquid in the two sides of the U-shaped tube. Why is there such a difference in height.
A 1530 kg car is travelling with the speed of 15.0 m/s. What is the magnitude of the horizontal net force that is required to bring the car to the halt in a distance of 40.00 m.
A person does 100 joules of work of pulling back the string of the bow. What will be the original speed of a 0.5 killogram arrow when it's fired from the bow.
A tank having a volume of 0.100 m3 contains helium gas at 135 atm. How various balloons can the tank blow up if each filled balloon is a sphere 0.300 m in diameter at an absolute pressure of 1.50 atm.
How much work did movers do (horizontally) pushing a 150-{rm kg} crate 10.6 m across a rough floor without acceleration, if the effective coefficient of friction was 0.50.
Charge q is fired through a small hole in the positive plate of a capacitor. If q is a positive charge, does it speed up or slow down inside the capacitor? reply this question using the concept of force.
Two forces are applied to a car in an effort to accelerate it. The first force, F1 = 328 N, is applied at an angle α = 35° to the forward dashed line. The second force, F2 = 544 N, is applied at an angle β = 8° to the forward dashed line. (a) What is..
Two equally charged particles, held 22.4 cm apart, are released from rest. The initial acceleration of the first particle is observed to be 4.0 m/s2 and that of the second particle is 6.0 m/s2.
Using the medium p model of the line, Find the current, voltage, reactive power, real power, & power factor at the sending end of the line.
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