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A toy cannon uses a spring to project a 5.39-g soft rubber ball. The spring is originally compressed by 4.93 cm and has a force constant of 7.96 N/m. When the cannon is fired, the ball moves 15.9 cm through the horizontal barrel of the cannon, and the barrel exerts a constant friction force of 0.031 9 N on the ball
(a) With what speed does the projectile leave the barrel of the cannon?
(b) At what point does the ball have maximum speed?
(c) What is this maximum speed?
A stone is dropped from the roof of a building; 2.10s after that a second stone is thrown straight down with the initial speed of 18 m/s, and both stones hit the ground at the equal time. How long did it take for the first stone to hit the ground.
q1. a conveyor belt at a quarry lifts 2000 kg of sand per minute up a vertical distance of 12 meters. the sand is at
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A 45cm radius insulated sphere is charged so that the volume charged density is a function of the radius: Charge denisty=(34microC/m^4)r. Integrate to determine the total charge on the sphere.
The outside mirror on the passenger side of a car is convex and has a focal length of -6.9 m. find the magnification of the mirror
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A steel ball is dropped onto a hard floor from a height of 1.25 m and rebounds to a height of 1.16 m. (Assume that the positive direction is upward.) Calculate its velocity just before it strikes the floor
Design a response cost procedure for a 13 year old boy with a history of lying. Explain what makes response cost a negative punishment procedure.
A pilot, whose mass is 72.0 kg, makes a loop-the-loop in a fast jet. Assume that the jet maintains a constant speed of 185 m/s and that the radius of the loop-the-loop is 1.570 km, What is the pilot's apparent weight at the top of the loop-the-loop
A referee's whistle operates at 800Hz. What is the frequency you hear when she is running toward you on the court at 5 m/s
A current of 0.307 A through your chest can send your heart into fibrillation, ruining the normal rhythm of heartbeat, how many conduction electrons pass through your chest
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