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Suppose a ball player throws a ball at an angle of 55 degrees and a speed of 25 m/s. Next to the ball thrower, a receiver waits 0.4 seconds after the ball is thrown and runs (at constant speed) to catch the ball. Assume the ball is thrown and caught at the same height.
a. What is the distance the ball is thrown?
b. What is the speed the receieve needs to run to catch the ball?
Physics - Speed and Direction, Driving along a crowded freeway, you notice that it takes a time t to go from one mile marker to the next.
A carbon sample of the same size taken from a fresh piece of bone emits 16 beta emissions a minute. How long ago did the saber-tooth tiger live?
A proton is placed in an electric field of intensity 700 N/C. What is magnitude and direction (towards or away from the field) of the acceleration of this proton because of this field? The charge on a proton is +1.6 x 10-19 C and the mass of a prot..
A 175-g object is attached to a spring that has a force constant of 72.5 N/m, Find the locations of the object when its velocity is one-third of the maximum speed
Suppose a train engineer is climbing a vertical ladder at a speed of 0.2m/s while the train is slowly coasting east at 0.70 m/s. Find out the vector of the engineer relative to the ground in rectangular notation.
Three point charges are arranged along the x axis. Charge q1= -4.70 nC is located at x= 0.200 m and charge q2 = 2.20 nC is at x = -0.340 m. A positive point charge q3 is located at the origin.
A speedboat starts from rest and accelerates at +2.32 m/s2 for 6.78 s. At the end of this time, the boat continues for the additional 5.34 s with an acceleration of +0.677 m/s2. Following this, the boat accelerates at -0.686 m/s2 for 8.68 s.
A golf ball strikes a hard, smooth floor at an angle of 30 ° and, as the drawing shows, rebounds at the same angle. The mass of the ball is 0.047 kg, its speed is 45 m/s just before and after striking the floor. What is the magnitude of the impuls..
A disk of radius R = 9 cm is pulled along a friction less surface with a force of F = 15 N by a string wrapped around the edge. At the instant when d = 28 cm of string has unwound off the disk, what is torque exerted about the center of the disk.
In a lightning bolt, a large amount of charge flows during a time of 1.6 x 10-3 s, How much charged has flowed during the lightning bolt
an airplane flying at a constant speed of 160 m/s pulls out of a dive in a circular arc. the 80 kg pilot presses down on his seat with a force of 3000 N, What is the radius of the arc
A 70.0 kg construction worker stands at the far end of the beam. What is the magnitude of the torque about the point where beam is bolted into place.
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