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The driver begins to accelerate immediately and reaches 110km/h after driving 500m. If the original speed was 80km/h, what is the driver's rate of acceleration?
A particle moves along the x axis undet the influence of a stationary object. the force exerted on the particle is given bu F=8x^3, where f is in newtons and x is in meters. if x=0 is taken to be t
This robot weighs 3450 N more on planet A than it does on planet B. Both planets have the same radius of 1.33 107 m. What is the difference MA - MB in the masses of these planets?
The vertical section of the string supports a 400 g object. The string does not slip at its contact with the pulley. (a) Find the frequency of oscillation if the mass of the pulley is 450 g.
Three equal 1.45- point charges are placed at the corners of an equilateral triangle whose sides are 0.700 long. What is the potential energy of the system? (Take as zero the potential energy of th
Find the quantum expectation value of x^2 for the nth state of a particle in the one-dimensional box and show that it approaches the classical limit L^2/12 as n approaches infinity.
what is d momentum change for both balls? is the momentum change identical? if not, the which ball would have the larger momentum change during the collision with the wall?
Determine the ratio of the maximum torque on the square loop to the maximum torque on the rectangular loop. (Enter your answer as a fraction, e.g., "5/6".)
The position of a particle moving along the x axis. What is the position of the particle when it achieves its maximum speed in the positive x direction?
A sports car of mass 1450 kg (including the driver) crosses the rounded top of a hill (r = 87 m) at 24 m/s. Determine the normal force exerted by the road on the car, the normal force exerted by the
0.25 kg length of aluminum wire is warmed 10°C by an electric current. How much heat was generated by the current?
A 1.20-kg ball is hanging on the end of a rope. The rope makes an angle 25.0° from the vertical when a 15.0 m/s horizontal wind blows. If the wind's force on the rope is negligible, what is the
If the speed of light is 3.00 x 108 m/s, what is the required angular spacing between the holes so the returning light will pass through the next hole?
A converging lens of focal length 7.93 cm is 16.6 cm to the left of a diverging lens of focal length -6.00 cm. A coin is placed 12.6 cm to the left of the converging lens. Calculate the location of
As the string is pulled, the pulley rotates without slipping. What is the angular speed of the pulley when the string has a linear speed of 5.0 m/s?
A car traveling at a speed of vo = 52 m/s stops smoothly (that is, its deceleration is constant) over a distance of d = 159 m. What is its acceleration during the time it is stopping?
The tub of a washer goes into its spin cycle, starting from rest and gaining angular speed steadily for 8.00 s, at which time it is turning at 7.00 rev/s. At this point, the person doing the laundry
You are said to project a particle of mass m, with initial velocity Vi at angle theta, with the x-axis. By the set of Lagrange's equation, describe the motion of a projectile.
A sound wave traveling at 340 m/s is emitted by the foghorn of a tugboat. An echo is heard 2.60 s later. How far away is the reflecting object? Answer in units of m.
What force will the seat belt have to exert on the dummy in item 3 to hold the dummy in the seat?
A student who weighs 470 N is wearing a backpack that weighs 84 N. The student is standing still on level ground.
A 10g bullet is fired horizontally into a 300g wooden block initially at rest on a horizontal service and becomes embedded in it. The coefficient of friction between block and surface is 0.50. The c
An electron has an initial velocity of (15.0 j + 22.0 k) km/s and a constant acceleration of (3.00*10^12 m/s^22)i in a region in which uniform electric and magnetic fields are present. If B = (400
The scale is set by Fs = 170 N. We release the block at x = 16.0 cm. How much work does the spring do on the block when the block moves from xi =+8.0 cm to (a)x=+6.0 cm, (b)x=-6.0 cm, (c)x=-8.0 cm,
A block of mass 1.90 kg is pushed 4.60 m along a frictionless horizontal table by a constant 16.0 N force directed 27.0° below the horizontal. (a) Determine the work done on the block by the app