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A 50.0-kg box is resting on a horizontal floor. A force of 250 N directed at an angle of 30.0° below the horizontal is applied to the box. The coefficient of static friction between the box and the surface is 0.400. What is the force of friction on the box?
A thin, horizontal, 10-cm-diameter copper plate is charged to 3.5nC. If the electrons are uniformly distributed on the surface.
a car travels at a constant speed around a circular track whose radius is 2.6 km. the car goes once around the track in
A 1410-kg racecar is driving around a circular track of radius 161 m. What is the magnitude of the net force acting on the vehicle at this time and the force's direction relative to the velocity
(a) Draw a free body diagram. (b) What angle does the strap make with the horizontal?
A 15.0-kg block of ice at 0.00°C falls into Lake Superior, which is a fresh water lake. The lake water is at 10.0°C, and the latent heat of fusion for ice is 3.34 × 105 J/kg.
The pulley is frictionless and of negligible mass. The coefficient of kinetic friction between mass 1 and teh ramp is 0.25. Evaluate the change in kinetic energy of the 50 kg block as it moves from a to b, a distance of 20 m
A handball of mass 0.10 kg, traveling horizontally at 25 m/s, strikes a wall and rebounds at 19m/s. What is the change in the momentum of the ball.
An electric field of 6.70×105 V/m is desired between two parallel plates, Determine what charge must be on each plate
Find dimensionless groups affecting the temperature stability of the reactor: assign each its proper physical meaning - Plug in expression for q and rA
The image of an object placed 30cm from the lens is formed at 20 cm from the lens on the other side. Find the refractive index of the material of the lens.
A system consists of three billiard balls. Each ball has mass m and is traveling at speed v. One ball is traveling north, another ball is traveling east, and the third ball is traveling south. What is the momentum of the system?
What is the coefficient of kinetic friction between the ground and the crate - Greezy increases his force to 400 N. What is the acceleration of the crate?
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