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A 100 kg car traveling at 20 m/s collides with a 100 kg car traveling at 8 m/s in opposite direction, What percentage of the original kinetic energy of this?
A 1.5 kg object initially at rest is raised to a height of 10 m by a force of 40 N. What is the velocity of the object at this height ? What time is needed for this motion ? What is the total work
A shell is fired at an angle of 20 degree above the horizontal at a velocity of 200 m/s a) what is the range? b) What is its velocity at highest point of the trajectory?
A 100 kg car travelling at 20 m/s collides with a 100 kg car traveling at 8 m/s in opposite direction, a) if the two cars stick together , what is their final velocity ? b) how much kinetic energy
What force must be applied to 5kg object to move it downward with acceleration 1 m/s^2 ? What is the direction of the applied force ?
A shell is fired at an angle of 20 degree above the horizontal at a velocity of 200 m/s. What is its velocity at highest point of the trajectory?
Explain how medical magnetic resonance imaging (MRI) exploits the magnetic properties of the nucleus. Explain how a sound is actually a form of energy? In what medium do sound waves travel?
Suppose a cube of aluminum which is 1.00 cm on a side accumulates a net charge of +3.10 pC. (a) What percentage of the electrons originally in the cube was removed?
Find the force exerted by these charges on a fourth charge q = +3 nC at the remaining (upper right) corner. (Assume the +x axis is directed to the right and the +y axis is directed upward.)
2.0 kg block is attached to a spring with spring constant 22 N/m. While the block is sitting at rest, a student hits it with a hammer and almost instantaneously gives it a speed of 46 cm/s. (a) What
A spring with spring constant 15.0 N/m hangs from the ceiling. A ball is attached to the spring and allowed to come to rest. It is then pulled down 3.0 cm and released. If the ball makes 55 oscillat
The position of a 50 g oscillating mass is given by x(t) = (2.0 cm) cos(5t), where t is in seconds. Determine the following. (a) The amplitude. (b) The period. (c) The spring constant. (d) The maxi
Let P be a point on the peripheryof the front wheel. One can show that the x and ycoordinates of P are described by the following functions of time and Determine the expressions for the velocity, sp
A flat metal washer is heated. As the washer's temperature increases, what happens to the hole in the center? A flat metal washer is heated. As the washer's temperature increases, what happens to th
The Young's modulus for wire A is 1.80 x 1011 Pa and for B is 1.20 x 1011 Pa. If the weight suspended from wire A is 2.00 kg, what would the weight attached to wire B need to be to produce a) equal
A solid lead cylinder and a solid platinum cylinder have the same mass. What is the ratio of the length of the platinum cylinder to the length lead cylinder if their diameters are the same?
Find (a) the magnitude of the resultant vector A+B+C+D , and (b) its direction as a positive angle relative to due west.
What is the net force exerted by these two charges on a third charge = 50.5 placed between and at = -1.230 ? Your answer may be positive or negative, depending on the direction of the force.
Would you get the same relationship between distance up the ramp parallel to the ramp rather than height and stopping distance?
In a certain particle accelerator, protons travel around a circular path of diameter 18.0 m in an evacuated chamber, whose residual gas is at 290 K and 1.56 x 10-6 torr pressure. (a) Calculate the n
(a) By how much did the internal energy of the gas change? If the quantity of gas present is 2.3 x 10-3 mol, find the molar specific heat of the gas at (b) constant pressure and (c) constant volume.
A horse walks in a 24 ft diameter circle, making 144 trips around the circle in one hour. Using the currently accepted value of 746 watts for 1 horsepower, calculate the force in pounds with which
Vector A is in the direction 30.0 clockwise from the -y-axis. The x-component of A is Ax = -16.0m 1. what is the y-component of vector A ?
A 2.83-kg object is thrown vertically upward from the surface of Mars, where the acceleration due to gravity is g1 = 3.71 m/s2. The initial velocity is v1, and the object reaches a maximum height of
The wire is fastened at its upper end and hangs vertically. How great a weight can be hung from the wire without exceeding the proportional limit? How much does the wire stretch under this load? Wha