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A hobby rocket reaches a height of 68.4 meter and lands 225 meter from the launch point. Find what was the angle of launch?
You drive north on a highway, then, without changingspeed, you round a curve and drive east. What is the changer of your velocity and your acceleration
The same train ordinarily decelerates at a rate of 1.95 m/s2. How long does it take to come to a stop from its top speed
Theoretically where on a rollercoaster should you feel the heaviest? Use the concept of inertia. Where do you actually feel the heaviest
A child playing tee ball hits a stationary 65 {\rm g} ball with a 300 {\rm g} bat swinging initially at 4.0 {\rm m/s}. What's the bat's post-impact speed
Their motions have equal periods, but the radius of skater A's circle is half that of skater B's circle. Evaluate the ratio of the magnitudes of the forces acting on each skater?
A man in a maze makes three consecutive displacements. His first displacement is 6.00 m westward, and the second is 16.0 m northward. find the magnitude and direction of his third displacement
A proton that has a mass m and is moving at 390 m/s in the + direction undergoes a head-on elastic collision with a stationary oxygen nucleus of mass 16m
After fixing a flat tire on a bicycle you give the wheel a spin. If its initial angular speed was 4.92 rad/s and it rotated 13.2 revolutions before coming to rest, For what length of time did the wheel rotate
a 8.00 cm diameter wire coil is initially oriented so that its plane is perpendicular to a magnetic field of 0.510 t
In a large centrifuge used for training pilots and astronauts, a small chamber is fixed at the end of a rigid arm that rotates in a horizontal circle. obtain How long is the arm of the centrifuge
In the annual battle of the dorms, students gather on the roofs of Jackson and Walton dorms to launch water balloons at each other with slingshots. Find the initial speed of this second balloon
a baseball just clears a 3.20-m wall that is 113 m from home plate. if the ball leaves the bat at 35.0deg and 1.20 m
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