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A van is moving with a constant acceleration, a0, up a hill that makes an angle ? with the horizontal. what is the acceleration of the van
A string under tension of 50.0 N is used to whirl a rock in a horizontal circle of radius 2.5 m at a speed of 20.4 m/s on a frictionless table. What is the breaking strength, in Newtons, of the strin
Two particles with masses 2m and 5m are moving toward each other along the x axis with the same initial speed, Find the final speeds of the two particles after the collision
A heavier mass m1 and a lighter mass m2 are 20.0 cm apart and experience a gravitational force of attraction that is 9.00 10-9 N in magnitude. Determine the value of each individual mass
Starting from rest, a 12 cm diameter compact disk takes 2.4 s to reach its operating angular velocity of 1925 rpm. How much torque is applied to the disk
Consider a Bragg mirror with nhigh=3.5, nlow=3.1, thigh=60.7nm, tlow=68.5nm , estimate the overlap of light with low index material
Two identical blocks are stacked one on top of the other. What is the maximum horizontal force that can be applied to the lower block without the upper block slipping
From the shore of a frozen lake, a QB throws a 2 kg football at a velocity of 20 m/s. How far does the person slide before they come to a stop
A 3000 kg truck is heading east at 80 mph. A 1000 kg car is heading north at 40 mph. They collide and stick togther. What is the velocity and direction of the car/truck
An object starts from rest at t= 2 s at an initial position of x = 7.2 m and moves with constant acceleration. What is the magnitude of the acceleration of the object
A 1.7m -long barbell has a 21kg weight on its left end and a 32kg weight on its right end. What is the torque due to gravity about the left end of the bar
A figure skater is spinning at a rate of 1.2 rev/s with her arms outstretched. What is her new rate of rotation
A weather vane initially at rest has a moment of inertia of 0.116 kg · m2 about its axis of rotation. Find the angular velocity of the weather vane just after it is struck
The average density of the planet Pluto is 2357 kg/m3. The acceleration of gravity on its surface is 0.76 m/s2. Calculate the average radius of Pluto
A rod of length L and charge Q is placed right next to another identical rod with charge -Q. What is the direction of the electric field at point P on the +y axis
A 1.43 kg object is held 1.28 m above a relaxed, massless vertical spring with a force constant of 318 N/m. The object is dropped onto the spring. How far does the object compress the spring
A crate is dragged 4.0m along a rough floor with a constant velocity by a worker applying a force of 450N to a rope at an angle of 30? to the horizontal. What is the total work done on the crate
You are given a pendulum composed of a 0.024 kg mass on the end of a 0.60 m long massless string. Find the gravitational potential energy of the mass
A ray of light traveling through air encounters a 1.7cm -thick sheet of glass at a 42? angle of incidence. Assume n = 1.5. How far does the light ray travel inside the glass
A 1-cm-thick layer of water stands on a horizontal slab of glass. A light ray in the air is incident on the water 64? from the normal. what is the ray's angle from the normal
A father racing his son has 1/3 the kinetic energy of the son, who has 1/3 the mass of the father. What are the original speeds ofthe father
the current is an inductor is .10 A and the frequency is 750 hz. if the inductance is .080 H what is the voltage across the inductor
Calculate the acceleration of a skier heading down a 10.0 deg, slope, assuming the coefficient of friction for waxed wood on wet snow
A battery has an internal resistance of 0.60 ?. A number of identical light bulbs, each with a resistance of 9.6 ?, How many bulbs are connected
A 0.14- kg block on a wooden table is given a sharp blow with a hammer. The block then slides across the table to a stop. How far does the block go