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A crate is pulled to the right with a force of 82 N, to the left with a force of 115 N, upward with a force of 565 N and downward with a force of 236 N. What is the magnitude and the direction of t
A string of mass density 0.0040 kg/m is under tension of 360N and is fixed at both ends. One of its resonance frequencies is 375 Hz. the next higher resonance frequency is 450 Hz. What is the funda
What will happen to the amplitude of the current in the LRC circuit when the frequency of the applied voltage is at or near the resonant frequency of the circuit.? Explain
Tarzan tries to cross a river by swinging from one bank to the other on a vine that is 10.7 m long. His speed at the bottom of the swing, just as he clears the surface of the river, is 8.7 m/s. Tar
A 70-kg man (rad=0.25m) standing on a 10-kg disc (rad=0.4m) with his arms extended (rad=0.9m) holding a 15-kg weight in each hand. What is the rotational inertia of the man with weights?
Ann is driving down a street at 53km/h. Suddenly a child runs into the street. If it takes Ann 0.709s to react and apply the brakes, how far will she have moved before she begins to slow down? Answ
What minimum horsepower must a motor have to be able to drag a 260 box along a level floor at a speed of 1.45 if the coefficient of friction is 0.50?
Draw two diagrams for the situation where a moving train (with initial speed V0) collides elastically with a target train that is not initially moving, and the trains use their springy bumpers to bo
Romeo (74.0 kg) entertains Juliet (57.0 kg) by playing his guitar from the rear of their boat at rest in still water, 3.00 m away from Juliet, who is in the front of the boat. After the serenade, J
Draw diagrams showing a situation where a bigger, moving train, vi, collides with a smaller train that is not moving. Assumer that after the collision the trains stick together.
An 63.0 N box of clothes is pulled 7.8 m up a 30.0° ramp by a force of 105 N that points along the ramp. If the coefficient of kinetic friction between the box and the ramp is 0.22, calculate t
How far apart are an object and an image formed by a 75 cm focal-length converging lens if the image is 2.64 X larger than the object and is real?
150 grams of boiling water (temperature 100° C, heat capacity 4.2 J/gram/K) are poured into an aluminum pan whose mass is 1000 grams and initial temperature 21° C (the heat capacity of alumi
Some good estimates about the human body can be made if it is assumed that we are made mostly of water. The mass of a water molecule is 2.99 10-26 kg. If the mass of a person is 62 kg, estimate the
Suppose a 70-kg boy and a 43-kg girl use a massless rope in a tug-of-war on an icy, resistance-free surface. If the acceleration of the girl toward the boy is 3.0 m/s2, find the magnitude of the acc
A passenger train is traveling at 32 m/s when the engineer sees a freight train 384 m ahead of his train traveling in the same direction on the same track. The freight train is moving at a speed of
A hunter aims directly at a target (on the same level) 113 m away. If the bullet leaves the gun at a speed of 255 m/s, by how much will it miss the target?
A 3.0 syringe has an inner diameter of 5.0 , a needle inner diameter of 0.28 , and a plunger pad diameter (where you place yfinger) of 1.2 . A nurse uses the syringe to inject medicine into a patie
What is responsible or raising Jim's heart and respiratory rate and stimulating sweating just before the race?
when a 103 N bag of nails hangs motionless from a single vertical strand of rope, how much tensions is exerted in each strand?
The density of free electrons in gold is 5.90 x 1028 m-3. The resistivity of gold is 2.44 x 10-8 at a temperature of and the temperature coefficient of resistivity is 0.004 ()-1. A gold wire, 1.3 m
An airplane flies 200km due west from city A to city B and then 300 km in the direction of 30 degrees North of West from city B to city C. In straight-line distance, how far is city C from city A?
A 63-kg person on skis starts from rest down a hill sloped at 33° from the horizontal. The coefficient of friction between the skis and the snow is 0.19. After the skier had been moving for 5.0
The nucleus of the helium atom contains two protons that are separated by about 3.0 X 10-15 m. Find the magnitude of the electrostatic force that each proton exerts on the other.
At an outdoor market a bunch of bananas is set to oscillatory motion with an amplitude of 20.0 cm on a spring with a force constant of 16.0 N/m. It is observed that the maximum speed of the bunch o