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Q1. A chair of mass 14.0 kg lies atop a horizontal floor; the floor is not frictionless. You push on the chair with a force of F = 40.0 N directed at an angle of 42.0 degrees below the horizontal and the chair slides along the floor.By means of Newton's laws, calculate n, magnitude of the normal force that the floor exerts on the chair.
Q2. A 1600 kg car starts from rest at A, coasts 180m through a dip and comes to stop at B after coasting a distance d on level ground. If the rolling resistance is a constant force of 280N, conclude the distance d.
When 5.30* 10^5 J of heat is added to a gas enclosed cylinder fitted with a light frictionless piston maintained at atmospheric pressure, estimate the work done by the gas
The diodes are oppositely oriented, so that when one diode is forward-biased, the other is back-biased. Which phrase best describes the current in the circuit.
Draw vectors indicating the normal force. suppose that the weight of the femur is negligible compared to the applied downward force.
A machine part rotates at an angular speed of 0.40 rad/s; its speed is then increased to 2.0 rad/s at an angular acceleration of 0.76 rad/s2
A conducting bar rests on two parallel horizontal rails 50 cm apart forming a square area. The resistance of the bar and the rails is assumed to be constant and equal to 0.05 ??. What is the maximum value of the force acting on the bar during that ..
A 191g oscillator has a speed of 96.50cm/s when its displacement is 2.70cm, What is the oscillators maximum speed
The mass of Mercury is 0.0550 times that of earth, and its radius is 0.380 times that of earth, Calculate the average density of Mercury (in kg/m3) given the earth's density is 5.52×103 kg/m3
A 50 kg block and a 100kg block are connected by string. the pulley is frictionless and of negligible mass. the coefficient of kinetic friction between the 50kg block and incline is 0.250. find the change in the kinetic energy of the 50kg block as..
Four equal point charges of +3.0 uC are placed in air at the our corners of a square that is 40cm on a side. find the force on any one of the charges
A house has a floor area of 162.0 m2 and an outside wall that has an area of 40.50 m2. The earth's magnetic field here has a horizontal component of 2.550E-5 T, Determine the magnetic flux through the wall if the wall faces north
An electron moves from the initial position r = (0.1m)I to final position r=(0.2m)j. what is the surface charge density (i.e. charge per area) on the inner surface of the conducting sphere
A generator has a square coil consisting of 500 turns. The coil rotates at 82 rad/s in a 0.49 T magnetic field. What is the length of one side of the coil
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