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An Australian emu is running due east in a straight line at a speed of 12.5 m/s and slows down to a speed of 11.4 m/s in 7.3 s. (a) What is the direction of the bird's acceleration? north south east west (b) Assuming that the acceleration remains the same, what is the bird's velocity after an additional 2.0 s has elapsed? (Assume that due east is the positive direction. Indicate the direction with the sign of your answer.)
The two blocks, m1 = 1.40 kg and m2 = 5, are connected by a mass less rope that passes over a pulley. The pulley is 12 cm in diameter and has a mass of 2.0 kg.
A particle of mass M decays into two identical particles each of mass m, where m = 0.4M. Prior to the decay, the particle of mass M has a total energy of 4 Mc2 in the laboratory reference frame. The velocities of decay product are along the directi..
Certain stars at the end of their lives are thought to collapse combining their protons and electrons together to form a neutron star. Such a star could be thought of as a giant atomic nucleus.
A roller coaster, travelling with an initial speed of 15 meters per second, decelerates uniformly at -7 meters per second per second to a full stop. How far does the roller coaster travel throughout its deceleration.
A shop sign weighing 245-N is supported by a uniform 155-N bean. Find out the tension in the guy wire, and the horizontal and vertical forces exerted by the hinge on the bean.
Macaroni and cheese packages specify how long to cook the pasta in boiling water. Calculate the concept relating temperature and pressure in cooking of food.
An 11g bullet is fired into an 11kg wood block that is at rest on the wood table. The block, with the bullet embedded, slides 5.11 across the table. The coefficient of kinetic friction for wood sliding on wood is 0.25.
Two small nonconducting spheres have a total charge of 93.1 C. When placed 1.01 m apart, the force each exerts on the other is 11.5 N. What is the charge on each? What if the force was attractive?
A particle of mass m is constrained to move between two concentric impermeable spheres of radii r = a and r = b (a
A bucket of water with a mass of 2kg is attached to a rope that is wound around a cylinder. The cylinder has a mass of 3 kg and is mounted horizontally on frictionless hearings. The bucket is released from rest.
A hunter aims directly at a target (on the same level) 140 m away.
How many electrons are there in a tablespoon. Find the tension in each cable. right cable and left cable.
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