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Drawing Equipotential Surfaces and Field Lines. In a letter sized bond
paper, draw the equipotential surfaces and equipotential lines for the configurations of
the charges listed below. For a distinction, use different colors to illustrate the two lines
(e.g., red for field lines, pencil for equipotential surfaces).
1. An isolated negative
charge.
2. Two like charges. 3. Two unlike charges
A 1,000 kg car rounds a curve on a flat road of radius 50 meters at a speed of 50km/hour. Will the car follow the curve or will it skid? Assume a) the pavement is dry and the coefficient of static friction is u=0.60; b) the pavement is icy, coefficient of friction is u=0.25?
Objects with masses of 200kg and 500kg are separated by 0.4m
Find
a)the net gravitational force exerted by these objects on a 50kg object placed midway between them
b) at what position can the 50kg object be placed so as to experience a net force of zero
A copper road whose length at 70°c is 4.0m is heated to 10°c find it
A free-to-move point charge of mass m1 = 2.00 g and charge q1 = 5.00 μC is orbiting in a perfectly circular orbit due to the electric forces from another free-to-move point charge of mass m2 = 5.00 g and charge q2 = −2.00 μC. If the distance between these two charges is a constant d = 1.00 m, find the orbital period of q1. You may assume gravitational forces are negligible.
A 50-g block is attached to a massless spring of natural length 10.0 cm and spring constant k = 10.0 N/m. The spring is then compressed to a length of 8.00 cm and is
placed on an inclined plane, as shown in the figure. The block is then released. If the inclined plane has a friction coefficient of μ = 1.00, and an inclination of θ = 3π/8 radians, what is the final length of the spring after it stops moving? Answer in cm.
an elephant of mass 1500kg stands on its four legs each of area 0.012m^2, calculate the pressure exerted by each leg of the elephant on the ground.(g=10m/s)?
How much work is done by pulling up on a suitcase at 40.0 elevation with a force of 5.00lb while moving it horizontally 1320.ft?
A rigid plank 5.00m long has mass 30.0kg and supports a 75.0kg block 2.00m from the left to end. How much force is needed to support each end of the plank?
Enrico is sitting on a chair with wheels (on a frictionless floor) and is facing a wall d = 1.00 m in front of him. He throws a ball with initial velocity v = 6.00 m/s. After hitting the wall, the ball rebounds with the same kinetic energy. Let Enrico and his chair have mass M = 66.7 kg and let the ball have mass m = 100 g. The setup conserves momentum, so that when Enrico throws the ball, the impulse he imparts on the ball makes him and his chair move to the right at a constant velocity. Find the angle (in degrees) Enrico must throw the ball with respect to the horizontal so that he perfectly catches the ball after it bounces off the wall. You may assume that the height of Enrico’s chair is negligible.
