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The maximum safe acceleration for passengers while stopping is about half of g. You know from years of reading books about trains that a typical train has a mass of 5E5 kg.
A small sphere with mass 2.20 hangs by a thread between two large parallel vertical plates 5.00 apart. The plates are insulating and have uniform surface charge densities. The charge on the sphere
In plotting the points, round-off the coordinate values to the nearest integer. Construct a graph corresponding to the stone's vertical displacement.
Determine the minimum horizontal velocity which should be imparted to the lower ball so that it can make one complete revolution?
Determine the moment of inertia for the shaded area about the y axis. State the method of integration used and label the diagram accordingly.
Find the distance from the ?rst speaker to a receiver at A if it records a minimum in sound intensity. Take the speed of sound to be 345 m/s. Answer in units of m
A fireman pushes on a closed door. What force makes a reaction pair with the force exerted by the fireman onto the door?
A vertical scale on a spring balance reads from 0 to 185 N. The scale has a length of 11.5 cm from the 0 to 225 N reading. A fish hanging from the bottom of the spring oscillates vertically at a fr
A 2.50-kg stone is dropped from rest at a height of 3.75 m. What impulse does gravity impart to this stone from the instant it is dropped until it hits the ground, assuming negligible air resistanc
It rebounds to a height of 2.50 m. If the ball is in contact with the floor for 12.2 ms, what is its average acceleration during that contact?
You are standing 2.5 {rm m} directly in front of one of the two loudspeakers shown in the figure. They are 3.0 {rm m} apart and both are playing a 686 {rm Hz} tone in phase. As you begin to walk dir
what is the angular speed when she reaches a point r=0.50 m from the center? B) Compare the kinetic energy before and after she moves inward, are they the same?
A two kilogram block is dropped from a height of 0.45m above an incompressable spring.the spring has an elastic constant of 200n/m and an negligable mass.the block stricks at the end of the spring a
Plot a velocity/time graph for the above data with time as the independent variable. what was the initial velocity of the probe?
Water is flowing through a pipe whose cross sectional area at point A is larger than the cross sectional area at point B. The reading on a pressure gauge connected to the pipe at point A will be:
A 0.01-kg object is initially sliding at 9.0 m/s. It goes up a ramp (increasing its elevation by 1.5 m), and then moves horizontally before striking a spring of force constant k = 100 N/m. The sprin
Two projectiles are thrown with the same initial speed, one at an angle with respect to the level ground and the other at angle 90 degree. both projectiles strike the grond at the same distance fro
If the water absorbs all the solar energy and does not exchange energy with its surroundings, how many hours will it take to warm from 15 degrees celsius to 25 degrees celsius?
The spring sends the bearing to a height of 1.27 m. Calculate the horizontal distance the ball would travel if the same spring were aimed 36.0 deg from the horizontal.
A juggler performs in a room whose ceiling is a height 3.0 m above the level of his hands. He throws a ball upward so that it just reaches the ceiling.At the instant when the first ball is at the c
If a super-ball of mass 200-g is dropped from 3 m in the air, but only bounces back 2.8 m, how much energy was lost in the collision with the ground?
Two balls are moving in the same direction. Ball A has half the mass of ball B, and is moving at twice its speed. (a) Which ball has the greater momentum?
What is the spring constant (k) of a spring if a force of 50N stretches the spring by 15 cm?
Babe Didrikson holds the world record for the longest baseball throw (296 ft) by a woman. What is the ball's initial speed?
A person driving her car at 45 approaches an intersection just as the traffic light turns yellow. She knows that the yellow light lasts only 2.0 before turning to red, and she is 28 away from the n