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A person pushes a 16.2-kg shopping cart at a constant velocity for a distance of 27.5 m on a flat horizontal surface. She pushes in a direction 32.3 ° below the horizontal. A 35.3-N frictional force opposes the motion of the cart. (a) What is the magnitude of the force that the shopper exerts? Determine the work done by (b) the pushing force, (c) the frictional force, and (d) the gravitational force
Two blocks (A and B) are in contact on a horizontal frictionless surface. A 40N constant horizontal force is applied to A. The mass of A is 5.0kg and the mass of B is 20k
A 0.060 kg tennis ball, moving with a speed of 5.50 m/s, has a head-on collision with a 0.090 kg ball initially moving in the same direction at a speed of 3.00 m/s
A particle (m = 3.9 x 10 ^-28kg) starting from rest, What is its de Broglie wavelength at the end of this period
A 300kg piano is being lowered into position by a crane while two people steady it with ropes pulling to the sides. What is the tension in the vertical main cable supporting the piano
Two identical conducting spheres, fixed in place, attract each other with an electrostatic force of 0.139 N when their center-to-center separation is 69.5 cm.
The current in the circuit if the speed v is 0.75 m/s , determine which end of the rod is positive.
An electron with speed v0 =4.16×106m/s is traveling parallel to and along the same direction as an electric field of magnitude E = 7.90×103N/C, How far will the electron travel before it stops
At launch, the Space Shuttle weighs 4.5 million pounds (2.04 million kilograms). As the vehicle starts from rest on the launch pad, what force must this seat exert on him during liftoff
Consider a common mirage formed by super-heated air just above a roadway. A truck driver whose eyes are 2.00 m above the road, Find the index of refraction of the air just above the road surface
Light of wavelength 500 nm is incident normally on a diffraction grating. What is the number of rulings per centimeter for the grating
A man sits on the south bank of a 100m wide river that flows due east at 2m/s. The man can swim 3m/s, How long will it take him to cross
You and Maria each own identical spaceships. As you fly past Maria, you measure her ship to be 96m long and your own ship to be 100 m long. How long does Maria measure your ship to be
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