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Magnitude of force on a charge q


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1.Scenario: A chair with a mass of 20.0 kg is attached to one end of a frictionless pulley system via a ...

a strong massless rope. The other end of the rope is attached to a steel water tank sitting on a flat horizontal concrete surface (see the image to the right). The coefficient of static friction between steel and concrete is 0.45 and the coefficient of kinetic friction between the surfaces is 0.30. The water tank, which is full of water, has sprung a leak. The combined mass of the water and the tank is 500 kg. This mass slowly decreases as the water leaks from the hole. You (i.e. your entire mass) are sitting at rest in the seat. You and the seat will remain at rest as long as the force of static friction is strong enough to hold you. Task: LET [DOWN] and [RIGHT] be positive. Using your knowledge of physics, determine the following: Draw the FBD of the system of you and the chair while at rest. Using the LET statement above, write out the net force equation. [2] Draw the FBD of the system of the water tank at rest on the flat horizontal surface. Using the LET statement above, write out the net force equations for both the vertical and horizontal planes. [3] Using the net force equations, determine the minimum mass of water that must be lost (i.e. leaked out) from the water tank in order for you and the seat to begin falling? [4] As soon as the chair begins to move, static friction between the steel tank and concrete surface becomes kinetic friction. Determine the magnitude of the kinetic friction. [3] Using Newton’s 2nd law, determine the acceleration of the system at the instant that the static friction becomes kinetic friction. [6]
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2.A diving board of neglible mass and length 3.0m is hinged at its left end and rests on top of ...

ort a distance d= 0.4 m away from the left end. A person of mass 61 kg stands at rest at the right end. What is the magnitude of the force provided by the hinge?
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3.Two masses are arranged as shown, with M1= 59 kg and M2= 140 kg far away from the gravitational effects ...

cts of any other masses. What is the magnitude of the gravitational force acting on mass M1 in the horizontal direction?
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4.2)Two books are accelerating to the right on a frictional surface and the coefficient of kinetic friction between the floor ...

ction between the floor and book is µk. Using the information given in the figure: (a) draw free body diagrams for both the books, and also for the combined system (of mass m1+m2), (b) find acceleration of the books along horizontal direction, and (c) find the magnitude and direction of the force exerted by the left book on the right book. 3.A car of mass 1500-kg enters a circular path at point P and leaves at point Q (see the figure) at constant speed of 5.0m/s, and the frictional force acting on its tires is 2500-N. a) how long it takes to reach point Q from point P, and b) what should be the minimum value of the coefficient of static friction between the tires and the road? 4)In an elevator which is accelerating downward at 2.5ms−2 , a 25-kg block hangs from a spring attached to the ceiling of the elevator. If spring gets stretched by 0.15m, find its spring constant.
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6.A block of mass 9.00 kg, moving on a horizontal frictionless surface with a speed 4.20 m/s, makes a perfectly ...

perfectly elastic collision with a block of mass M at rest. After the collision, the 9.00 kg block recoils with a speed of 0.400 m/s. In the diagram below, the blocks remain in contact for 0.18 seconds. Find the magnitude of the average force ( in Newtons) exerted on the 9.00 -kg block, while the two blocks are in contact.
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7.A 90 kg crate rests on a level floor at a shipping dock. The coefficients of static and kinetic friction ...

tion are 0.66 and 0.31, respectively. A man pushes down and forward on the crate at an angle of 42° from the horizontal. (a) Draw a free body diagram. Include all components as taught in the course. (b) What is the magnitude of the pushing force required to slide the crate across the dock at a constant acceleration of 2.1 m/s2?
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8.A 5kg mass is pushed by 2 forces horizontally( one 10N to the rigtht at a 53 degree, and the ...

n 4N to the left), and 1 vertical force(6N downwards). Determine the net vertical force Determine the magnitude and direction of the net force Determine the acceleration of the mass
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1.AU MAT 120 Systems of Linear Equations and Inequalities Discussion

mathematicsalgebra Physics