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A highway curve has a radius of 0.14 km and is unbanked. A car weighing 12 kN goes around the curve at a speed of24 m/s without slipping. What is the magnitude of the horizontal force of the road on the car?
a boy throws a 2 kg rock at a 5 kg block of styrofoam that hangs by a 3 m long rope attached to a tree branch. when the
Determine how much force is needed to keep a 62 kilogram crate moving across a floor at constant speed if the coefficient of friction between the floor and the crate is .18
A tennis ball may leave the racket of a top player on the servewith a speed of 67.0 m/s. what is the average force on the ball
steel train rails are laid in 12m long segments placed end to end. the rails are laid on a winter day when their
An electron traveling north enters a region where the electric field is uniform and points west. The electron:
how do you know if the far point is the object distance (So) or the image distance (Si) in a problem, Calculate the focal length of Sam's glasses
A 1.80 m tall man lifts a 2.00 kilogram book from the ground therefore it is 2.40 meter above the ground. Find the potential energy of the book relative to the top of the man's head
A muon is produced by a collision between a cosmic ray and an oxygen nucleus in the upper atmosphere at an altitude of 50 km, What is the velocity of a muon at the surface
A husband and wife take turns pulling their child in a wagon along a horizontal sidewalk. Each exerts a constant force and pulls the wagon through the same displacement. They do the same amount of work, but the husband's pulling force is directed ..
The creation and study of new and very massive elementary particles is an important part of contemporary physics. To create a particle of mass M requires an energy Mc2. With enough energy, an exotic particle can be created by allowing a fast-movin..
Three charges sit at the corners of an equilateral triangle with sides of length d = 3cm. Calculate the electric potential at the centre of the triangle
A student (m = 63 kg) falls freely from rest and strikes the ground. During the collision with the ground he comes to rest in a time of 0.040 s. From what height did the student fall
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