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A 7700-kg boxcar traveling 18m/s strikes a second car. The two stick together and move off with a speed of 5.0m/s. What is the mass of the second car?
The driver of a car slams on the brakes when he sees a tree blocking the road. The car slows uniformly with acceleration of -5.20 m/s2 for 4.05 s, making straight skid marks 61.0 m long, all the way to the tree. With what speed does the car then s..
An airplane with a speed of 93.3 m/s is climbing upward at an angle of 58.5 ° with respect to the horizontal. Relative to the ground, determine the angle of the velocity vector of the package just before impact
A woman throws a ball at a vertical wall d = 3.0 m away. The ball is h = 1.5 m above ground when it leaves the woman's hand with an initial velocity of 12 m/s at 45°.
A laser used to weld detached retinas emits light with a wavelength of 654nm in pulses that are 20.2ms in duration. How much energy is in each pulse
A 60.0-kg runner expends 335 W of power while running a marathon. determine the volume of bodily fluid (assume it is water) lost per hour
How long would it take for an object dropped from the Leaning Tower of Pisa (height 54.6 meters) to hit the ground, and how fast was the object traveling at the moment of impact
Suppose you throw a 0.048-kg ball with a speed of 10.7 m/s and at an angle of 32.1° above the horizontal from a building 11.5 m high. What will be its kinetic energy when it hits the ground
A 111g Frisbee is 25cm in diameter and has half its mass spread uniformly in the disk and the other half concentrated in the rim. What is the Frisbee's rotational inertia
A 1250 kg cannon, which fires a 80 kg shell with a speed of 546 m/s relative to the muzzle, is set at an elevation angle of 39° above the horizontal. At what angle with the ground is the shell projected
what is the diameter of the copper rod. Pull horizontally on a crate with a force of 140 N and it slides across the floor in a dynamic equilibrium. How much friction is acting on crate.
A sphere of radius r starts from rest and rolls without slipping along a curved surface, Find the final speed v of the sphere's center of mass
Two converging lenses are placed 88.0 cm apart. An object is placed 1.100 m to the left of the first lens, What is the focal length of the second lens
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