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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.
A satellite has a geo-synchronos orbit around the earth. How far is it above the earth's surface
A sphere of radius R = 0.325 m and uniform charge density -151 nC/m3 lies at the center of a spherical, find the magnitude of the electric field at the following radial distances from the center of the charge distribution
a physicist out at the cabin uses a sonar device to determine the speed of a jet-ski on the nearby pond. a 20.5 khz
question1illustration on eratosthenes process if two observers are due north and south of each other and are detached
A standing wave is established in a 89 cm long string fixed at both ends. The string vibrates in 6 segments when driven at 376 Hz. What is the fundamental frequency?
question a circuit consists of a resistor in series with an inductor and an ac generator that supplies a voltage of 115
you drop a stone into a deep well and hear it hit the bottom 1.60 s later. this is the time it takes for the stone to
A crate with mass 35.5 initially at rest on a warehouse floor is acted on by a net horizontal force of 120. What acceleration is produced.
A 20 times telescope has a 12{rm cm}diameter objective lens. What minimum diameter must the eyepiece lens have to collect all light rays from an on-axis distant source.
Block A of mass 4.0 kg is on a horizontal, frictionless tabletop and is placed against a spring of negligible mass and spring constant 650 Nm. calculate the speed of the block as it leaves the table
Determine the acceleration of the bullet while in the barrel? A bullet in a rifle barrel does not have constant acceleration, but constant acceleration is to be assumed for this problem.
The charge +q travels a distance d from point A to point B in a uniform electric field of magnitude E, what is the work done by the field on the charge
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