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Q. The loaded cab of an elevator has a mass of 3x10^3 kg and moves 177m up the shaft in 23 s at constant speed. At what average rate does the force from cable do work on the cab?
Q. Consider a super tanker, with a mass of 6×10^8 {rm kg}. If it is pushed by a rocket motor (force 7×10^6 {rm N}) and is subject to no other forces, what would be the magnitude of its acceleration?
Blocks with masses of 4.0, 8.0, and 9.0 are lined up in a row on a frictionless table. All three are pushed forward by a 16 force applied to the 4.0 block. How much force does the 8.0 block exert on the 8.0 block.
The internal energy of the coin
Discover minimum thickness of glass
Displacement is which of the following types of quantities.
Valerie is able to do 1200 joules of work in 10seconds. Brett is able to do 5000 joules of work in 50 seconds. Who is more powerful.
Three charges are situated at corners of a rectangle. How much energy would be expended in moving the 8µC charge to infinity.
You travel to an alien planet. The local population tries very hard to tell you what gravity is on the surface. You cannot understand them, and do not have a tool to calculate gravity directly. You also ran out of water. They offer a liquid to you, o..
wheel A of radius rA = 11 cm is coupled by belt B to wheel C of radius rC = 20 cm. The angular speed of wheel A is increased from rest at a constant rate of 1.6 rad/s2. Find out the time needed for wheel C to reach an angular speed of 100 rev/min,..
A photon with a wavelength 4.40 scatters from an electron initially at rest. Find out the wavelength of the scattered photon when the scattered electron has its utmost kinetic energy. Kmax = 2.37*20^-14.
what is the magnetic field between the rails. A lead ball is dropped into a lake from a diving board 6 above the water. After entering the water, it sinks to bottom with a constant velocity equal to the velocity with which it hit the water. The bal..
How many joules of kinetic energy does a 750 automobile traveling at a typical highway speed of 65 have.
Jessica's weight is 540 newtons. According to the Third Law, if the Earth pulls on Jessica with a force of 540 N, then Jessica pulls on the Earth with a force of 540 newtons that acts in the opposite direction.though , if Jessica stumbles while rol..
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