A car is traveling downhill with a constant velocity. Which of the following are true? (a) There is a net force acting on the car in the downhill direction. (b) There is a net force on the car in the uphill direction. (c) There is a net vertical force acting on the car. (d) There is no net force acting on the car.
The initial (t=0) position, velocity, and acceleration of an object moving in simple harmonic motion
The initial (t=0) position, velocity, and acceleration of an object moving in simple harmonic motion (with center at the origin x=0) are xi=3.00 cm, vi=4.00 cm/s, and ai=-7.00 cm/s2, respectively. Use the cosine function to specify the position. (a) Determine the angular frequency of the motion. rad/s (b) Determine the
A harmonic wave is given by y(x,t) = 4cos(3.61x - 6.1t). To the nearest hundredth of a meter what is the wavelength? What is its period to the nearest thousandth of a second? What is the velocity of the wave to the nearest hundredth of a m/s? What will be the value of y to two decimal places in problem 1 if x = 1.07 and
The velocity of waves on a string is 277 m/s. If the frequency of standing waves is 131 Hz, how far apart are the nodes?
After an intense battle against physics test, some guy goes to his dorm, exhausted and wounded. While eating his hybrid beetle- cockroach stumbling around. In a quick relocation plan, the guy gives it a gentle flick:(see attachment for diagram): The bug is flicked at a 45 degree angle with an initial velocity of 2 m/s. If the
(See attached file for full problem description with diagrams) --- ? A 9.26-kg sign is hung using two cables which make an angle of 34.5 degrees with the horizontal. Determine the weight (in Newtons) of the sign. ? Referring to the previous problem.) Determine the tension (in Newtons) in a single cable. ? A 55.9-kg sig
1. A 1-kg block of wood is dropped from a position 2.4 meters above a resting 0.05-kg ball. Shortly thereafter, the ball is shot horizontally at a velocity of 28 m/s. If the wood is 8.4 meters away from the ball in the horizontal direction, determine the distance (to two decimal places) the wood falls from its original position
A runner of mass m runs around the edge of a horizontal turntable mounted on a vertical, frictionless axis through its center. The runner's velocity relative to the earth has magnitude v. The turntable is rotating in the opposite direction with an angular velocity of magnitude omega relative to the earth. The radius of the turnt
If a planet has a mass of 9.42 x 1024 kg and a radius of 5.47 x 106 meters, to the nearest m/s what is its escape velocity? If the mass is increased by a factor of 2, what is the new escape velocity? If the radius is decreased by a factor of 0.22, what is its new escape velocity? (See attached file for full problem desc
(See attached file for full problem description with diagram and symbols) --- 1.) A thin, 80.0 disk with a diameter of 9.00 rotates about an axis through its center with 0.220 of kinetic energy. What is the speed of a point on the rim? 2.) A 3.0-m-long rigid beam with a mass of 100 kg is supported at each end. An 8
Potential Flow Theory : Find the resultant velocity vector induced at point A by the uniform stream, line source, line sink, and vortex.
Find the resultant velocity vector induced at point A by the uniform stream, line source, line sink, and vortex. Please see the attached file for the fully formatted problem. ---
A 2.28 N force is applied to the plunger of a hypodermic needle. If the diameter of the plunger is 1.14 cm and that of the needle 0.215 mm, with what force does the fluid leave the needle?
The drinking fountain outside your classroom shoots water about 16.6 cm up in the air from a nozzle of diameter 0.594 cm. The pump at the base of the unit (1.20 m below the nozzle) pushes water into a 1.20 cm diameter supply pipe that goes up to the nozzle. What gauge pressure does the pump have to provide? Ignore the viscosity;
? Tom is chasing Jerry across a table 1.5 m high, Jerry steps out of the way at the last second, and tom slides off the edge of the table at a speed of 5 m/s. where will tom strike the floor and what velocity components will he have just before he hits the ground. ? Two objects are initially the same height above the groun
Please see attached files for full problem descriptions. Problem 4: The pilot of an aircraft wishes to fly due west in a wind blowing at 55 km/h toward the south. If the speed of the aircraft in the absence of wind is 179 km/h, in what direction (in degrees) should the aircraft head? Use the counter-clockwise from east conv
(a) Without the wheels, a bicycle frame has a mass of 8.13 kg. Each of the wheels can be roughly modeled as a uniform solid disk with a mass of 0.820 kg and a radius of 0.343 m. Find the kinetic energy of the whole bicycle when it is moving forward at 3.35 m/s. K= J (b) Before the invention of a wheel turning on an axle,
Please explain how to calculate the velocity of a projectile shot upward from the surface of the earth with an initial velocity of 120 m/s after 5 seconds and after 10 seconds using a position function of s(t) = -4.9(t^2) + Vo(t) + So.
If an object with a velocity of Xm/s on an air track hits a second object that is not moving (no velocity) and they stick together, and we know that the mass of the second object is 8 times the mass of the first object, how do you calculate the final velocity?
Assuming a perfectly circular orbit, how do you calculate the velocity of an object as it orbits around another object assuming for the rotating object that R=150x 10 to the six power km?
What are the speed of the resulting 50 g blob of clay? See attached file for full problem description with units.
I have a problem just like it in my physics book, but the mass is different. In my book it is 600 g and the answer is 0.2 s. See attached file for full problem description with diagram and units. A 400 air-track glider collides with a spring at one end of the track. The figure 1 shows the glider's velocity and the for
(See attached file for full problem description with equations) --- A bullet is shot through two cardboard disks attached a distance D apart to a shaft turning with a rotational period T, as shown. (see diagram in attachment) a) Derive a formula for the bullet speed V in terms of D, T, and a measured angle between
It is possible for the velocity of a rocket to be greater than the exhaust velocity of the gases it ejects?
It is possible for the velocity of a rocket to be greater than the exhaust velocity of the gases it ejects? When that is the case, the gas velocity and momentum are in the same direction as the rocket's. How does the rocket still obtain thrust by ejecting the gases?
1. Calculate the average speed of the Earth in its orbit about the sun. (The radius of the orbit is 1.5 x 10^11 meters.) Give this in m/s and in miles/h. Now, what is the average velocity of the earth, averaged over one year's time? 2. Is it possible for speed to be constant while acceleration is not zero? Give an example.
Leonardo da Vinci, in the fifteenth century, formulated a different law of motion. He proposed that the distances fall in successive equal intervals of time are proportional to the consecutive integers. That is, suppose that, starting from rest, a body falls one foot in the first time interval. Then the body will traverse two fe
In a demonstration known as the ballistics cart, a ball is projected vertically upward from a cart moving with constant velocity along the horizontal direction. The ball lands in the catching cup of the cart because both the cart and ball have the same horizontal component of velocity. Now consider a ballistics cart on an inclin
How many significant numbers do each of the following numbers have? a. 214 b. 81.60 c. 7.03 d. 0.03 e. 0.0086 f. 3236 g. 8700 NOTE the 10 with a number after in () is power of ten/ scientific Notation Write the following numbers in full with the correct number of zeros. a. 8.69x10(4) b. 9.1x10(3) c. 8.8x10(-1) d.
1. The study of forces in equilibrium is called: (a) statics (b) traction (c) medium (d) angular velocity 2. The first condition for equilibrium: the sum of all forces is: (a) 100 (b) 50 (c) 1 (d) 0 3. The second condition for equilibrium, the sum of all lS zero. (a) forces (b) torque (c) momentum
Cross-linking a Polymer Objective The objective of this experiment is to crosslink a polymer and observes the changes in the physical properties of the polymer as a result of the crosslinking. Changes in physical properties are also sensitive to amount of crosslinking. This experiment could be expanded to investigate vario
1) A stone is thrown vertically upward with a speed of 18.0m/s. A.how fast is it moving when it reaches a height of 11.0m? B.how long is it required to reach this height? C.Why are there two answers to b.? 2) A falling stone takes 0.28s to travel past a window 2.2m tall. From what height above the top of