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A football player carrying the ball runs straight ahead at the line of scrimmage and directly into a wall of defensive linemen. The ball carrier has an initial speed of 7.68m/s and is stopped in a time interval of 0.198 s. Find the magnitude and direction of his average acceleration.
magnitude
In a head-on collision, a car stops in 0.17s from a speed of 30m/s . The driver has a mass of 78kg, What force is applied to the driver by his seat belt during that fraction of a second
A beam of electrons is incident on two slits separated by a distance of 2.0×10-6 m. Calculate the kinetic energy of the electrons
A student is looking at a monochromatic light source and is looking for the third bright fringe. At what angle should the student look for the third bright fringe
A runner's kinematics are being recorded to analyze gait. At a certain moment, the absolute angle of the trunk is 80°, What is the relative hip angle
A couple of astronauts agree to rendezvous in space after hours. Their plan is to let gravity bring them together. Find the his and her initial acceleration
A 12.0 g bullet is fired horizontally into a 106 g wooden block that is at first at rest on a frictionless horizontal surface and connected to a spring having spring constant 143 N/m.
the coefficient of static friction is 0.26. If you apply the minimum force needed to get the refrigerator to move, illustrate what will the acceleration then be?
A 73 trampoline artist jumps vertically upward from the top of a platform with a speed of 4.0. If the trampoline behaves like a spring of spring constant 6.2×104, how far does he depress it.
Find out the coefficient of static friction
A 2100 kg car traveling to the right at 32m/s is chasing a second car of the same mass that is traveling to the right at 10m/s.
a hydrogen atom is in the n= 2 state. what's the wavelength of a photon with this energy
The invaders’ thermometer shows the temperature on earth to be 58 °I. Using logic similar to that in Example 1 in the text, illustrate what would this temperature be on the Celsius scale?
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