Sand from a stationary hopper falls onto a moving conveyor belt at the rate of 5.00 kg/s as in the figure. The conveyor belt is supported by frictionless rollers and moves at a constant speed of 0.750 m/s under the action of a constant horizontal external force Fext supplied by the motor that drives the belt. Find (a) the san
(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,
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 and equations) --- A stone is thrown vertically upwards so that its height, measured in feet, after t seconds is given by s(t) = 100t - 16t2. What is its initial velocity? Determine the maximum height of the stone and the time of flight of the stone. ---
(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
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.
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
Two cars lost in a blinding snowstorm are traveling across a large field, each thinking they are on the road, as shown in the figure on the left. They collide. If the distance x is 124 meters and the red car is travelling at 12.7 mph, how fast to the nearest hundredth of a mph was the blue car travelling?
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
A passenger at rest on a flatbed train car fires a bullet straight up. The event is viewed by observers at rest on the station platform as the train moves past the platform with constant velocity. What is the trajectory of the bullet as described by the observers on the platform? A a straight horizontal path in the directi
Two relativistic electrons are ejected simultaneously from a piece of potassium in opposite directions each is traveling with a speed of 0.5c with respect to the metal. a) what is the velocity of electron 1 with respect to electron 2? b) what is the velocity of electron 2 with respect to electron 1?
At what velocities do the relativistic formulas for length contraction and time dilation give a 1% difference from classical values?
If water flows through a tube whose radius is .02 m, then what will be the pressure after the tube narrows to radius .01m?
If water flows at 1.5 m/s with pressure 60000N/m^2, through a tube whose radius is .02 m, then what will be the pressure after the tube narrows to radius .01m?
In reaching her destination, a backpacker walks with an average velocity of 1.14 m/s, due west. This average velocity results, because she hikes for 6.17 km with an average velocity of 2.53 m/s, due west, turns around, and hikes with an average velocity of 0.747 m/s, due east. How far east did she walk (in terms of km)?
When a truck creeps along in traffic at a speed of 5 m/s, a man walks diagonally across the back of the truck at 3m/s. To a traffic helicopter in a stationary position above the road the road, the man's apparent motion is the superposition of these two motions; that is, his apparent velocity is the vector sum of the two given ve
Two steel guitar strings have the same length. String A has a diameter of 0.50 mm and is under 410.0 N of tension. String B has a diameter of 1.0 mm and is under a tension of 820.0 N. Find the ratio of the wave speeds, vA/vB, in these two strings.
1) Sound waves travel through an aluminum bar at a speed of 1400 m/s. If the frequency of the sound wave is 880 Hz, what is the distance between crests on a sound wave traveling through aluminum? 2) An airplane flies horizontally at a constant speed, piloted by rescuers who are searching for a disable
1. A car slowed from 30 m/s to 20 m/s in 50. m. How long did it take for this to happen? 2. An auto with an initial velocity of 7.0 m/s accelerates at 0.71 m/s^2. It travels a distance of 1.0 km while accelerating. What is the final speed at the end of that displacement?
1. A steel ball bearing is dropped from the roof of a building. An observer standing in front of a window 120 cm high notes that the ball takes 0.125s to fall from the top to the bottom of the window. The ball bearing continues to fall, makes a completely elastic collision with a horizontal sidewalk, and reappears at the bottom
A 50 g ball of puty moving with a velocity of 3.0 m/s has an inelastic collision head on with a stationary mass of 50 g and sticks to it. find the velocity of the mass and putty after the collision a. 1.7 m/s b. 1.1 m/s c. 1.5 m/s d. 1.3 m/s
Question: The artery is 2/3 blocked. The normal speed is 0.40 m/s and blood density is 1060 kg/m^3. Find the velocity of the blood at the blocked area. Find the pressure difference between the normal and blocked area.
A golf ball is hit horizontally and went off with initial velocity of 2 m/s at a hill top (h=1m) Find x, the horizontal distance traveled and velocity of the golf ball just before it hits the ground (incluiding direction)
1) A 3 kg bowling ball traveling with a velocity of 3 m/s collides head-on with another bowling ball of the same mass traveling with a velocity of -2 m/s. If the collision is perfectly elastic, the velocities of the bowling balls after the collision is: a. 2 m/s an -3 m/s b. 5 m/s and 0 c/-2 m/s and -3 m m/s/s d. -2m/s and
A 300 g baseball traveling at 30m/s is struck by a bat in the direction from which it came at 40 m/s. find the impulse of the force on the baseball.
1. Find the total energy of the system at the given instant if the 20 kg disc has an angular velocity of 24 rad/s (clockwise), the bar AB has a mass of 2 kg, and the system is 1.5 meters above the ground. Assume the ground as the datum line (zero potential energy). a. 353 J b. 389 J c. 294 J d. 323 J e. 429 J
A car travels along a straight road, heading West for 3 hours, and then travels NE on another road for 2 hours. If the car has maintained a constant speed of 55 mi/hr, how far is it from its starting point?