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Two point charges -2Q and +3Q are on the x-axis, -2Q at the origin and +3Q at x = D. Choose the potential to equal zero at infinity.
If the down going elevator comes to rest with a constant deceleration over a distance of 4.4 m, what is the magnitude of the force the elevator floor exerts on the man?
A spring is first stretched 2.0 cm from its unstressed length. It is then stretched an additional 2.4 cm. How does the work required for the second stretch compare to the work required for the first
An object initially has kinetic energy K. The object then moves in the opposite direction with 13 times its initial speed. What is the kinetic energy now (in terms of the initial kinetic energy K)?
A car with a flat top contains a 3.2-cm thick piece of ice lying on its top. Determine how fast this car must travel through still (0?C) air if the piece of ice is to lift off the car. Assume that o
The plank is displaced by a small angle ? from its horizontal equilibrium position and released. Find the angular frequency with which the plank moves with simple harmonic motion. (Use any variable
If the drain is now opened, determine how fast the water will pour out of the drain. (a) 9.80 m/s (b) 9.85 m/s (c) 9.90 m/s (d) 9.95 m/s (e) 10.0 m/s (f) None of the above.
The average density of a person is about 1010 kg/m3. If a 202-lb person (in air) is fully submersed in a pool of water and stepping on a bathroom scale, what will be the reading on that scale? (a) 2
When an aluminum object is fully submersed in a pool of oil (with density 700 kg/m3) and place on a scale at the bottom of the pool, the scale reads 980 N. If this same object is fully submersed in
The distortion of the Earth's crustal plates is an example of shear on a large scale. A particular crustal rock has a shear modulus of 1.5 × 1010 N/m2. Determine the shear stress involved when
For safety in climbing, a mountaineer uses a nylon rope that is 50 m long and 1.0 cm in diameter. When supporting a 90-kg climber, the rope elongates 1.6 m. Determine the Young's modulus for this ny
Find its velocity at the end of this time interval. ______m/s (got this one = -.834) Next, assume it moves with simple harmonic motion for 3.90 s and x = 0 is its equilibrium position. (Assume that
What is the direction of the dog's velocity (measured from the +x-y axis toward the +y-axis)?
Linear progamming, The Medequip Company produces precision medical diagnostic equipment at two factories. Three medical centres have placed orders for this month’s production output. The table to th
If the axis of rotation is the lower end of the boom, the torque produced by the block has a magnitude of 3.20 x 10^7 NxM. Treat the boom's mass as negligible, and calculate the length of the boom.
If the radius of the circle is r = 3.0 meters, determine its mass m of the moving charged particle. My answer to this problem is 3.38 x 10^-12 what is the correct answer for this?
Find the net gravitational force exerted by these objects on a 32.0-kg object placed midway between them. magnitude Your response differs from the correct answer by more than 10%. Double check your
The linear density of the string is 5.00g/m What is the string tension? What is the maximum displacement of a point on the string? What is the maximum speed of a point on the string?
A gold brick measuring 0.25 ft. by 0.33ft by 1ft. is submerged in water. The weight density of gold is 1200 pounds per cubic foot and the weight density of water is 62.4 pounds per cubic foot. a) W
Two charges q1= +3x10^-6 and q2 = -6x10^-6 C are placed along the x axis at orgin and 1.2m respectively, b) What would be the electric potential energy of a third charge of q= +12 x 10^-6
A 2.0 m-long string vibrates at its second-harmonic frequency with a maximum amplitude of 1.5cm . One end of the string is at x =0cm . Find the oscillation amplitude at X=10, 20,30,40,50,60.
A given motorcycle has a mass of 235 kg. When driven in a circular pah with a radius of 25.0 m, the centripetal force generated is 1850 N. If the mass of the biker is 72 kg, what is the tangential s
A firefighter with a weight of 673 N slides down a vertical pole with an acceleration of 3.05 m/s2, directed downward. What are the magnitudes and directions (choose the positive direction up) of th
A 0.21 kg particle moves along an x axis according to x(t) = - 11 + 3 t + 5 t^2 - 5 t^3, with x in meters and t in seconds. What are projections of the net force acting on the particle at t = 3.2 s
What is the magnitude of the athlete's average force on the shot during the acceleration phase? (Hint: Treat the motion during the acceleration phase as though it were along a ramp at the given angl