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A 40 kg girl, skating at 7 m/s, collides with her 90 kg father who is initially standing still. He grabs his daughter as she hits him and they both glide off together. What is their speed after the collision?
Solid argon has a density of 1650 kg/m3. The atomic weight of argon is 40. Assuming each atom occupies a cubical volume, what is the distance between the argon atoms
A 150-W lamp is placed into a 120-V AC outlet. What is the resistance of the lamp
A car is moving along a straight stretch of road at 60 mph [ 26.7 meters/sec ]. how much work did the friction do in stopping the car
Three blocks are in contact with each other on a frictionless,horizontal surface. Find the resultant force on each block
Probelm 4-93 in Engineering Mechanics 13th. If F={100k} N, determine the couple moment that acts on the assembly. Express the result as a cartesian vector. Member BA lies in the xy-plane. Picture not shown, how do I post the picture? And I do not und..
A ball is fired at an angle of 45 degrees from ground level in the absence of air resistance. If the maximum range is 27m then what is its inital speed and what is the time of flight
A 76.2-kg skier rides a 2520-m-long lift to the top of a mountain. find the change in the skier's gravitational potential energy
An object weighs 294N in the air. When tied to a string, connected to a balance, and immersed in water, it weighs 240N. When it is immersed in oil, it weighs 258N.
A mechanic tests the tension in a fan belt by pushing against it with his thumb, What is the tension in the belt (while the mechanic is pushing)
Both surfaces of a double convex lens have radii of 30.0 cm. what is the index of refraction of the lens material
A man normally consumes 8.4 MJ of food energy per day. He then begins running a distance of 9km four times per week. If he expends energy at the rate of 450W while running at 12 km/h , how much more food energy should he consume daily in order to mai..
A weight lifter lifts a 360-N set of weights from ground level to a position over his head, a vertical distance of 2.05 m. How much work does the weight lifter do
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