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The next two questions are worth 20 points in total. For both questions, consider the following: A 25 kg object is pushed across a horizontal floor by a 300 N force in the direction shown. The coefficient of kinetic friction between the object and floor is mu k = 0.30. You will be determining the acceleration of the object. You may assume that the object is sliding to the right in the figure.
1. What is the magnitude of the normal force that the floor exerts on the object?
2. What is the acceleration of the object?
The potential difference between the plates of a parallel plate capacitor is 35 Volt and the electric field between the plates has strength of 750 V/m. compute the capacitance of this capacitor
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A positively charged particle of mass 6.80 10-8 kg is traveling due east with a speed of 25 m/s and enters a 0.32-T uniform magnetic field. What is the magnitude of the magnetic force acting on the particle
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an object of unknown mass is attached to an ideal spring with force constant 120 nm and is found to vibrate with a
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An electron travels with v=4.40 x 10^6 i m/s through a point in space where E=(2.1 x 10^5 i, -2.1 x10^5 j) V/m and B =-.12k T. What is the force on the electron
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A blacksmith heats a 1.9 kg iron horseshoe to 480 degree C, then plunges it into a bucket containing 10kg of water at 20 degree C. The specific heat of iron is 447 J/kgK. What is the final temperature.
A car travels due east with a speed of 48.0 km/h. Raindrops are falling at a constant speed vertically with respect to the Earth. Find the velocity of the rain with respect to the following reference frames
A proton and an alpha particle after being accelerated through same potential difference enter a uniform magnetic field the direction of which is perpendicular to their velocities
A 28 cm tall object is placed in front of a concave mirror with a radius of 33 cm. The distance of the object to the mirror is 84 cm. Calculate the focal length of the mirror. Calculate the image distance. Calculate the magnification of the image ..
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