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A toy train is pushed forward and released at = 4.0 with a speed of 2.5 . It rolls at a steady speed for 3.0 , then one wheel begins to stick. The train comes to a stop 9.4 from the point at which i
A 65.0 kg base runner begins his slide into second base when moving at a speed of 4.2 m/s. The coefficient of friction between his clothes and Earth is 0.70. He slides so that his speed is zero jus
A total resistance of 3.0ohms is to be produced by combining an unknown resistor R with a 12 ohm resistor. what is the value of R and how is it to be connected to the 12 ohm resistor.
A 0.50 kg mass hangs from a string which is attached to a 1 kg box. The coefficient of friction between the box and the table top is 0.12. When the hanging mass is allowed to fall freely, the system
In a physics lab experiment a student immersed 200 onecent coins (each having a mass of 3.00 g) in boiling water. After they reached thermal equilibrium, she fished them out and dropped them into 0.
Neglect air resitance. Find rocket's kinetic energy when the rocket is 1000 km above Earth's surface
What is the maximum amplitude with which the end of the board can vibrate in order that a pebble placed there will not lose contact with the board during the oscillation?
A uniform electric field of magnitude 355 N/C pointing in the positive x-direction actos on an electron, which is initially at rest. The electron has moved 3.40 cm.
A 0.450-kg ball is dropped from rest at a point 1.30 m above the floor. The ball rebounds straight upward to a height of 0.700 m. What are the magnitude and direction of the impulse of the net force
The intensity of a particular earthquake wave is measured to be 4.0 106 J/m2·s at a distance of 49 km from the source. What was the intensity when it passed a point only 7.0 km from the source?
You are given a vector in the xy plane that has a magnitude of 84.0 units and a y component of -53.0 units. What are the two possibilities for its x component?
You fire a gun horizontally that is 25.0 m off the ground and the bullet goes at 200.0 m/s. What is the time it takes for the bullet to hit the ground, how far down range does the bullet travel, and
The bright fringes are found to be separated by a distance of 0.1 mm. Planck's constant is 6.63 × 10 -34 J · s. What is the kinetic energy of the electrons in the beam? Answer in units of
Imagine a frictionless pulley (a solid cylinder) of unknown mass M and radius r = 0.200 m which is used to draw water from a well. A bucket of mass m = 1.50 kg is attached to a massless cord wrapped
Water in a 0.310 kg iron pot initially at 19.3oC. If the final equilibrium temperature is 24.8oC, calculate the initial temperature of the hot horseshoe.
The average force exerted on him by the ground is +18000 N, where the upward direction is taken to be the positive direction. From what height did the student fall? Assume that the only force acting
The loop is in a uniform magnetic field of magnitude 89.0 mT whose direction is parallel to the current in the 130 cm side of the loop. What are the magnitude of the magnetic forces on each of the t
A block of mass 6.2 kg is pulled along a horizontal frictionless floor by a cord that exerts a force of 42.0 N at an angle 22.4° above the horizontal. What is the magnitude of the acceleration
A circular loop in the plane of the screen lies in a 0.72 T magnetic field pointing into the screen. The loop's diameter changes from 18.5 cm to 6.0 cm in 0.50 s. What is the magnitude of the averag
On a very muddy football field, a 110 kg linebacker tackles an 85 kg halfback. Immediately before the collision, the linebacker is slipping with a velocity of 8.6 m/s north and the halfback is slidi
What are the minimum dimensions for the rear-view mirror if the driver is to be able to see the entire width and height of the rear window in the mirror without moving her head?
Metabolizing a candy bar releases about 106 joules. How fast must the candy bar travel to have the same 106 joules in the form of kinetic energy? (Assume the candy bar's mass is 0.2 kg.)
Suppose the needle moves 8.2 mm from its highest to its lowest position and it makes 27 stitches in 8.5 s. What is the maximum needle speed?
A point charge 9.00 {rm nC} is at the center of a cube with sides of length 0.180 {rm m}. What is the electric flux through the surface of the cube?
You're carrying a 3.6m long, 25kg pole to a construction site when you decide to stop for rest. You place one end of the pole on a fence post and hold the other end of the pole 35cm from its tip. Ho