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A 45kg box is pulled across a horizontal floor. A rope attached to the box makes an angle of 30 degrees with the horizontal and the coefficient of friction between the box and the floor is 0.7. What is the tension in the rope in order to pull the box at a constant rate?
A 5.16 multiply.gif 10-5 H solenoid is constructed by wrapping 64 turns of wire around a cylinder with a cross-sectional area of 8.80 multiply.gif 10-4 m2, Determine the change in the length of the solenoid
A 80 kg man in a 7.0 kg chair tilts back so that all the weight is balanced on two legs of the chair. Assume that each leg makes contact with the floor over a circular area with a radius of 1.0 cm,
A 9.10 kg board is wedged into a corner and held by a spring at a 50° angle, as the Illustrating shows. The spring has a spring constant of 196 N/m and is parallel to the floor.
Two charges q1 = ?3.20 nC and q2 = +8.90 nC are at a distance of 1.20 µm from each other, What is the kinetic energy of the charge q2 when it is 0.340 µm from q1
Consider an airless, non-rotating planet of mass M and radius R. Calculate the ratio h/R of the projectile's maximum height to the planet's radius
A sample of ideal gas occupies a volume of one litre at atmospheric pressure and temperature, 20 C. What pressure is required to squeeze the gas into one-half litre at 40 C?
q1. a camera falls from a blimp that is 259 m above the ground and rising at a speed of 10.2 ms.find the maximum height
One component of a magnetic field has a magnitude of 0.070 T and points along the +x axis, Find the magnitude of the net magnetic force that acts on the particle
An object is placed in front of a diverging lens of focal length of 17.0cm, Using the thin lens equation find the distance from the lens to the object and from the lens to the image
A 10-kg box is stationary on the ground and pushed by a downward force of 30 N. Calculate the supporting normal force acted on the box from the ground
A 2.3kg wood block is pulled along a wood floor at a steady speed. What is the magnitude of the force pulling on the first block
Under certain conditions, the human body can withstand an acceleration of 10 g's. What is the net force (in Newtons) acting on a person
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