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1 . A Wooden box item sits on a horizontal wooden board. The coefficient of static friction between the box and the board is 0.5. You grab one end of the board and lift it up, keeping the other end of the board on the ground. What is the angle between the board and the horizontal direction when the box begins to slide down the board?
2. A truck is initially traveling due north at 23 m/s.
(a) Find the velocity of the car after 4 s if its acceleration is 2m/s^2 due north.
(b) Find the velocity of the car after 4 s if its acceleration is instead 2m/s^2 due south.
q1. a hotel elevator ascends 270 m with a maximum speed of 5.0 ms. its acceleration and deceleration both have a
q1. a cannonball launched with an initial velocity of 161 ms at the angle of 45 degrees follows a parabolic path and
Suppose that a 1.00 cm3 box in the shape of a cube is perfectly evacuated, except for a single particle of mass 1.21 10-3 g. Find the average pressure on the other walls
You have a solid conducting sphere (radius A, net charge -2Q) surrounded by a conducting spherical shell (inner radius B, outer radius C, net charge +3Q). What is the electric field everywhere
On a frictionless, horizontal air table, puck A (with mass 0.150 kg ) is moving toward puck B (with mass 0.400 kg ), What was the speed of puck A before the collision
1. your friend is an environmentalist who is living in a tree for the summer. you are helping provide her with food and
A non-conductor sphere of radius a has a negative chargedistribution given by the function p = -c / r2 where cis a positive constant with units of C/m) calculate the charge on the spher.
The potential difference between the accelerating plates of a TV set is about 25 kV. If the distance between the plates is 1.5 cm, find the magnitude of the uniform electric field in the region between the plates.
A woman holds a tube of lipstick 2.3 cm from a spherical mirror and notices that the image of the tube is upright and one fifth its normal size, Determine the position of the image. Is it in front of or behind the mirror
The mass of Venus is 0.8140 times that of earth, and its radius is 0.950 times that of earth. Calculate the acceleration of gravity at the surface of Venus
Three air carts have masses, 4m,2m and m. the most massive cart hasan initial speed of Vo; the other two carts are at restinitially. All carts are equipped with spring bumpers that giveelastic collisions.
A one-meter-long glass tube is sealed at one end. How far from the midpoint will the mercury be when the closed end of the tube is immersed in boiling water
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