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Julie throws a ball to her friend Sarah. The ball leaves Julie's hand a distance 1.5 meters above the ground with an initial speed of 13.0 m/s at an angle 52.0 degrees; with respect to the horizontal. Sarah catches the ball 1.5 meters above the ground. 1) After catching the ball, Sarah throws it back to Julie. The ball leaves Sarah's hand a distance 1.5 meters above the ground, and is moving with a speed of 10.0 m/s when it reaches a maximum height of 8.0 m above the ground. What is the speed of the ball when it leaves Sarah's hand? 2) How high above the ground will the ball be when it gets to Julie? (note, the ball may go over Julie's head.)
What are the following values about the central axis at the instant the torque has been applied for 195ms? The angular momentum of disk.
The two upper front teeth of a person exert a total force of 30N on a piece of steak. If the biting edge of each tooth measures 10 mm x 1 mm, find out the pressure on the steak.
What is the value of g at the location of this satellite. Discover the altitude of the satellite in meters.
assume the roller coaster (h1 = 37 m, h2 = 13 m, h3 = 30) passes point A with a speed of 3.10 m/s. If the average force of friction is equal to one third of its weight, with what speed will it reach point B? The distance traveled is 55.0 m.
A man is running at speed c (much less than the speed of light) to catch a bus already at a stop. At t=0, while he is a distance b from the door to the bus, the bus starts moving with the positive acceleration a.
A group of hikers hears an echo 3 s after shouting. If temperature is 16°C, how far away is the mountain that reflected sound wave.
A mass of 1.62 kg stretches a vertical spring 0.328 m. If the spring is stretched an additional 0.136 m and released, how long does it take to reach the (new) equilibrium position again.
An ideal spring has the spring constant k = 428 N/m. find the distance this spring must be stretched from its equilibrium position for 28 J of work to be done.
A golf ball with the initial angle of 34° lands exactly 240 m down the range on the level course.
The components of a simplest clamping circuit.
find the work done by the field on the electron. What is the change in potential energy associated with the electron.
As part of a safety investigation, two 1900 {rm kg} cars travelling at 19 {rm m/s} are crashed into different barriers. Find the average forces exerted on (a) car that hits a line of water barrels and takes 1.8 {rm s} to stop, and (b) car that hits a..
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