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1. Find the change in momentum of a 1140kg car that increases its speed from 4.5 m/s to 18.0 m/s in a time of 19s while travelin in the same direction?
2. What minimum force applied in the direction of motion is needed to do this? Please show answer and how you got it.
A near-sighted person's eyeglasses has a focal length of ? 22.0 cm, and the lens is 1.8 cm from the eye. If the person switches to contact lenses that are placed directly on the eye, what should be the focal length of the corresponding contact len..
At a certain point, A, in its motion, its velocity angle is 19° above the horizontal. At another point, B, later in its motion, its velocity angle is 39° below the horizontal. Illustrate what is the horizontal distance from point A to point B?
An AC generator consists of eight turns of wire, each having area A = 0.0890 m2, with a total resistance of 11.4 ?. Determine the induced emf and current as functions of time
Calculate the magnitude, the direction of resultant force and the coefficient of kinetic friction.
If a chain of 35 identical short springs linked end-to-end has a stiffness of 400 N/m, what is the stiffness of one short spring
An alpha particle (m = 6.7 x 10^-27kg, q = +3.2 x 10^-19C) has a speed of 30km/s at point A and moves to point B where it momentarily stops. Only electric forces act on the particle throughout this motion. Find out the electric potential difference.
The cone of a loudspeaker vibrates in SHM at a frequency of 262 Hz. The amplitude at the center of the cone is xm = 1.5 x 10-4m, What is its maximum velocity and acceleratio
A person looks horizontally at the edge of a swimming pool. If its length is 5.00m, and the pool is filled to the surface, to what depth (in m) could observer see? For water is 1.33).
A 0.88 kg projectile is fired into the air from the top of a 7.07 m cliff above a valley, How far from the bottom of the cliff does the projectile land and Find the time of flight
A sound wave from a siren has an intensity of 88.8 W/m2 at a certain point, What is the intensity level of the sound wave due to the ambulance
a long horizontal wire carries a current of 48 amps. A second wire, made of 2.5 mm diameter copper wire and parallel to the first, is kept in suspension magnetically 15 cm below. Determine the magnitude and direction of the current in the lower wi..
A soccer ball lying on the ground is kicked with an initial velocity of 10.0 m/s at an angle of 37 degrees above the horizontal
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