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A fireworks rocket is launched vertically into the night sky with an initial speed of 40 m/s. The rocket explodes and breaks into two pieces of equal mass some short time later. If the first piece follows a path 45 degrees above the positive x axis at a speed of 30 m/s, what is the magnitude and direction of the second piece after the explosion?
A uniform plank of length 5.40 m and weight 217 N rests horizontally on two supports, with 1.1 m of the plank hanging over the right support. To what distance x can a person who weighs 417 N walk on the overhanging part of the plank before it immedia..
Three men are riding on a train of proper length L that is moving at speed v = 3/5 c with respect to the ground, Calculate the time difference between the two emissions, in both frames
Two automobiles, each of mass 1000 kg, are moving at the same speed, 21 m/s, when they have an inelastic collision. In what direction and at what speed does the wreckage move if one car was driving north and one east?
A grocery cart with mass of 12kg is being pusch at constant speed up a flt 15 degree ramp by force which act at an angle 17 degree below the horizontal line.
A convex mirror has a focal length of -30.0 cm. A 15.0-cm-tall object is located 30.0 cm in front of this mirror. determine the location and size of the image
A 246 kg wooden raft floats on a lake. as a 85 kg man stands on the raft, it sinks 5.0 cm deeper into the water. When he steps off, the raft vibrates for a while.
The primary coil of an ideal transformer has 710 turns, and the secondary coil has 190 turns. find the output current of the secondary coil
Estimate the force P to accelerate the 80 - Ib block at 6ft/sec2 to the right.
A golfer hits a shot to a green that is elevated 3 m above the point where the ball is struck, find the speed of the ball just before it lands
A box is put on a slide to move it from one part of a factory to another the slide is at an angle of 20 degrees below the horizontal the coefficient of friction between the box and slide is 0.352 what is the acceleration of the box.
A spherical object with a radius of 40.0 cm has a net charge of 37.7uC distributed uniformly throughout its volume, Using Gauss's Law, calculate the electric field 71.5 cm from the center of the sphere
he boat continues for an additional 5.90 s with an acceleration of +0.518 m/s2. Following this, the boat accelerates at -1.49 m/s2 for 8.05 s. What is the velocity of the boat at t = 21.35 s? Find out the total displacement of the boat?
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