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A 20.0-kg box rests on a horizontal surface. The coefficient of static and kinetic friction between the box and the surface are 0.30 and 0.10 respectively. If a force of 80.00 N , what is the acceleration of the box in m/s^2?
What apparent free-fall acceleration is experienced by the managers remaining on the rim assume that the average mass for each inhabitant is 65kg.
You are practicing throwing darts in your dorm. You stand 2.89 m from the wall on which the board hangs. Calculate the speed of the dart when it hits the board
Two steel wires of the same length, one with radius r and the other with radius 4r, are connected together, end to end, and tied to a wall. How far does the point where the two wires meet move
A proton of mass mp and charge qp =e, deuteron of mass 2mp and charge qd =e, Find the velocities and derive the radii of the paths for deuteron and alpha particle in term of the mass and charge of proton
The owner of a van installs a rear-window lens that has a focal length of -0.310 m. When the owner looks out through the lens at an object located directly behind the van, How far from the van is the object actually located
A bullet is shot out of a gun with a 61 cm barrel at a speed of 410 m/s into a block of wood. The bullet enters the wood 13 cm. Illustrate what force does the block exert on the bullet? What is the time it takes?
A 81.0kN spaceship comes in for a vertical landing. From an initial speed of 1.00 km/s, What braking force must its rockets provide
the electromagnetic wave that delivers a cellular phone call to a car has a electric field with an rms value of 4.5e10^-2. find the intensity of the wave generated by this phone call
A sailboat is traveling east at 5.0 m/s . A sudden gust of wind gives the boat an acceleration a = (0.80 m/s^2 , 40 degrees north of east). A)What is the boat's speed 4.5s later when the gust subsides? B)What is the boat's direction 4.5s later whe..
A vibrating guitar string emits a tone simultaneously with one from a 500-Hz tuning fork. If a beat frequency of 5 Hz results, what is the frequency of vibration of the string
A person is making homemade ice cream. She exerts a force of magnitude 22 N on the free end of the crank handle, and this end moves in a circular path of radius 0.28 m. The force is always applied parallel to the motion of the handle. If the handl..
In a typical golf swing, the club is in contact with the ball for about 0.0010 s. estimate the magnitude of the force exerted by the club on the ball
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