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A set of crash tests consists of running a test vehicle moving at a speed of 12.4 m/s (27.7 mi/hr) into a solid wall. Strapped securely in an advanced seat belt system, a 57.0 kilogram (126lbs) dummy is found to move a distance of 0.720 meter from the moment the car touches the wall to the time the car is stopped. Compute the size of the average force which acts on the dummy during that time. Using the direction of motion as the positive direction, compute the average acceleration of the dummy during that time (in g's, with 1g = 9.81m/s2). In a different vehicle, the distance the dummy moves while being stopped is reduced from 0.720 m to 0.270 meter. Compute the average force on the dummy as that vehicle stops.
Mercury is approximately a sphere of radius 2.43 x 106 m. What is its circumference in kilometers and What is its surface area in square kilometers
Calculate the angular momentum of a solid uniform sphere with a radius of 0.150m and a mass of 15.5kg if it is rotating at 5.85rad/s about an axis through its center.Calculate kinetic energy of a solid uniform sphere with a radius of 0.150m and a mas..
A small block on a frictionless horizontal surface has a mass of 2.25×10?2kg . It is attached to a massless cord passing through a hole in the surface. (See the figure below (Figure 1) .) The block is originally revolving at a distance of 0.255m from..
A high fountain of water is in the center of a circular pool of water. You walk the circumference of the pool and measure it to be 150 meters. How high is the fountain
An astronaut's pack weighs 18.8N when she is on earth but only 1.95 N when she is at the surface of an asteroid. What is the mass of the pack on the asteroid
A 29? and a 41? resistor are in series, Find the current when this series combination is connected across a 12V battery
An isolated conductor has net charge +10 x 10-6 C and a cavity with a point charge q = +3 x 10-6 C. What is the charge on the cavity wall and the outer surface
An eagle is flying horizontally at 6.2 m/swith a fish in its claws. It accidentally drops the fish. How much time does it take before the fish's speed doubles?
hiker starts at his camp and moves the following distances while exploring his surroundings: 75.0 m north, Find his resultant displacement from camp
A 1.9x10^14 Hz electromagnetic wave propagates in carbon tetrachloride with a speed of 2.05x10^8 m/s
A person is riding a bicycle, and its wheels have an angular velocity of 10.6 rad/s. How much time does it take for the bike to come to rest
the magnitude jr of the current density in a certain cylindrical wire is given as a function of radial distance from
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