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Q. If a man pushes a lawn mower on a level lawn with a force of 200N. if 40% of the force is directed downward,how much work is done by the man in pushing the mower 6 m?
Q. A 0.2 object is swung in a vertical circular path on a string 0.1 m long. The acceleration of gravity is 9.8 m/s^2. If a constant speed of 4.07 m/s is maintained, what is hte tension in the string when the object is at the top of the circle? Answer in units of N.
A 60kg boy and a 45 kg girl use an elastic rope while engaged in a tug-of-war on a frictionless icy surface. If the acceleration of the girl toward the boy is 2.3 m/s2, find the magnitude of the acceleration of the boy toward the girl.
Dan is gliding on his skateboard at 4. He suddenly jumps backward off the skateboard, kicking skateboard forward at 8.00 (as measured by an observer on the ground). Dan's mass is 60 and skateboard's mass is 5.00 .How fast is Dan going as his fee..
illustrate a diagram to show the forces acting on the aircraft while it is flying in a horizontal circle with its wing banked at an angle to horizontal.
However, the current increases by just 0.11 A when R1 is removed, leaving R2 connected across the battery. Find (a) R1 and (b) R2.
A liquid with density of 1.65 x10 cubed kg/m cubed flows through 2 horizontal sections of tubing joined end to end. in the first section, the cross-sectional area is 10 cm2.
If the LED emits light from a circle with diameter 10mm and is to couple to the fiber which has a50 micro meter diameter core .assume it radiates with afull cone angle 30 degree.
A coffee filter of mass 1.5 grams dropped from a height of 2 m reaches the ground with a speed of 0.7 m/s. How much kinetic energy Kair did the air molecules gain from the falling coffee filter? begin from the Energy Principle, and choose as the s..
Two boats start together and race across a 64-km-wide lake and back. Boat A goes across at 64 km/h and returns at 64 km/h. Boat B goes across at 32 km/h, and its crew, realizing how far behind it is getting, returns at 96 km/h. Turnaround times ar..
A child looks at his reflection in a spherical Christmas tree ornament 8cm in diameter, and sees his image reduced by half. How long is his face from the ornament.
suppose that visible light enters a Plexiglas cube containing water at a 20o angle of incidence, travels through the water and exits the cube.
What portion of jet power lost to producing sound Powdered steel is placed in a container
Two identical carts travel at 1m/s in opposite directions on a common horizontal surface. They collide head-on and are reported to rebound, each with the speed of 2m/s.
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