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Q. A kg steel ball strikes a wall with a speed of m/s at an angle of with the surface. It bounces off with the similar speed and angle. If the ball is in contact with the wall for s, what is the average force exerted on the ball by the wall?
Q. A raft is made of 13 logs lashed together. Each is 37 cm in diameter and has a length of 5.6 m. How many people can the raft hold before they start getting their feet wet, assuming the average person has a mass of 70 kg? Do not avoid the weight of the logs. Assume the density of wood is 600 kg/m.
What is the highest possible induced emf in the antenna as it moves through the Earth's magnetic field.
A cylindrical container 2.00 tall contains mercury to a certain depth; the rest of the cylinder is filled with water. If the pressure at the bottom of cylinder is two atmospheres, what is the depth.
define the magnitude of the acceleration of the elevator. A 300 kg piano slides 4.1m down a 30 degree incline and is kept from accelerating by the man who is pushing back on it parallel to the incline. The effective coefficient of kinetic friction ..
Cowboy Joe wishes to shoot his assailant by ricocheting a bullet off the mirrored metal plate. To do so, should he simply aim at the mirrored image of his assailant.
suppose that the springs have somehow not yet compressed to their maximum amount. How much are the springs compressed.
compass needle points 25 degrees E of N outdoors. However, as it is placed 17 cm to the east of a vertical wire inside a building it points 61 degrees E of N. What is the magnitude of the current in the wire? The earth field there is 0.50X10^-4 T ..
A person walks 36° north of east for 2.36 km. How far would another person walk due north and due east to arrive at the similar location.
A car takes 9 s to go from v = 0 to v = 75 m/s at approximately constant acceleration. If you wish to find the distance travelled using the equation d = 1/2 at2, what value should you use for a.
A 94 g stone is whirled in a horizontal circle on the end of a 73 cm long string. The stone takes 1.10 s to make each complete revolution. Conclude the angle that the string makes with the horizontal.
Calculate the magnitude of the current density in the wire. Find out the work done by the hockey player on the puck. What is the change in kinetic energy of the puck.
calculate the total mechanical energy of the glider at any point in its motion. Calculate the maximum speed of glider.
A rock of mass 43.00 kg accidentally breaks loose from the edge of a cliff and falls straight down. The magnitude of the air resistance that opposes its downward motion is 252N. What is the magnitude of the acceleration of the rock.
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