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a ball is thrown horizontally from a 20-m-high building with a speed of 5.0 m/s
(a) Make a sketch of the balls trajectory.
(b) Draw a graph of Vx, the horizontal velocity, as a function of time. Include units of both axes.
(c) Draw a graph of Vy, the vertical velocity, as a function of time. Include units on both axes.
(d) How far from the base of the building does the ball hit the ground.
A thin uniform rod (mass = 0.95 kg) swings about an axis that passes through one end of the rod and is perpendicular to the plane of the swing. What is the maximum kinetic energy of the rod as it swings
A lunar lander is making its descent to Moon Base I. The lander descends slowly under the retro-thrust of its descent engine. What is the speed of the lander
Presume the electron is at the midpoint between the proton.
A typical photovoltaic cell delivers 4.0×10?3W of electric energy when illuminated with 0.11W of light energy. What is the efficiency of the cell
An alpha particle (the nucleus of a helium atom formed by 2 protons and 2 neutrons with charge q = +2(1.6 x 10-19 C), Calculate the acceleration of the alpha particle
The electric charge of a proton is distributed over a volume. The distribution of the proton can be approximated by the exponential equation rho = e/(8*pi*b)exp(-r/b). r is the radial position inside the proton and b equals .23 * 10^-15 m. Find th..
The safe slides with a constant speed if Clyde pushes from behind with 420 {rm N} of force while Bonnie pulls forward on a rope with 285 {rm N} of force. Illustrate what is the safe's coefficient of kinetic friction on the bank floor?
find frequencies of vibration of the piano wire. Car 1 has 3 times the mass of car 2, but only 0.5 as much kinetic energy. What is the ratio between the speeds of the two cars (v1/v2)? You must type your answer as a numerical value.
If electrons are accelerated from rest in an electron gun by sending them through a potential difference of 11.0 kV, what is the resulting kinetic energy of each electron?
A projectile is fired at v0 = 394.0 m/s at an angle of θ = 64.2o with respect to the horizontal, How far will the projectile travel in the horizontal direction, R
The dialectric breakdown of air is approximately 3E6 V/m. This is the electric filed required to create a spark, What is the approximate voltage on the sphere at that instant
It explodes on a mountainside 36.0 s after firing. Illustrate what are the x and y components of the shell where it explodes, relative to its firing point?
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