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Q. Two 3.5 kg bodies, A and B, collide. The velocities before the collision are A = (21 + 30) m/s and B = (-34 + 11) m/s. After the collision, ′A = (-4.5 + 16) m/s. What are (a) the x-component and (b) the y-component of the final velocity of B? (c) What is the change in the total kinetic energy (including sign)?
Q. A 65.00 kg ice skater moving to the right with a velocity of 4.40 m/s throws a .1 kg snowball to the right with a velocity of 40.0 m/s relative to the ground. a. what is the velocity of the ice-skater after throwing the snowball? Disreguard the friction between the skates and the ice. b. a second skater initially at rest with a mass of 60 kg catches the snowball. What is the velocity of the second skater after catching the snowball in a perfectly inelastic collision?
Two identical metal spheres and are connected by a plastic rod. Both are at first neutral. 6.0×10^12 electrons are added to sphere , then the connecting rod is removed.
A street lamp weighs 146 N. It is supported equally by two wires that form an angle of 120° with each other.
A boat moves through the water of a river at 9 m/s relative to the water, regardless of the boat's direction. If the water in the river is flowing at 1.9 m/s, how long does it take the boat to make a round trip consisting of a 225 m displacement d..
Two stationary positive point charges, charge 1 of magnitude 3.55 and charge 2 of magnitude 2.00 , are separated by a distance of 30. An electron is released from rest at the point midway between the two charges, and it moves along the line connec..
A 150 g ball and a 250g ball are connected by a 35{rm cm}-long, massless, rigid rod. The balls rotate about their center of mass at 150 rpm.
If the 2 kg mass slides on a horizontal frictionless surface, what is the speed of the mass 4 kg while it has fallen a distance 0.4 m downward from its rest position.
As observed from Earth, the wavelength of Hβ in the spectrum of the star Megrez in the Big Dipper is 486.112 nm. Laboratory measurements demonstrate that the normal wavelength of this spectral line is 486.133 nm. Is the star coming toward us or mo..
Using the data calculate the average speed of blood flow in the major arteries of the body which have a total cross-sectional area of about 2.0 cm2.
A sailboat leaves a harbor and sails 1.80 km in the direction 65 degrees sounth of east, the boath then sails 1.1 km in the direction 15 degrees north of east. the trip takes 15 minutes. what is the magnitude and direction.
Four identical masses of mass 710 kg each are placed at the corners of a square whose side lengths are 15.0 cm. What is the magnitude of net gravitational force on one of the masses, due to the other three.
An airplane with a mass of 2.6*10^6 kg. has the air flow past the lower surface of the wings at 100 m/s. If the wings have a surface area of 1200 m2, how fast should the air flow over the upper surface of the wing if the plane is to stay in the ai..
Using the capacitance determined in part (a),which equals 21 micro F, compute the current in the circuit 6.6 ms after the switch is closed. Assume that the capacitor is uncharged initially and that the emf of the battery is 9.0 {rm V}. Resistance= ..
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