Physics 151 Hamilton Aditya Singh SI Exam Review 11_13_2022 answer key

In a medical lab, you put blood in tubes in a centrifuge to separate the plasma from the formed elements (platelets, red blood cells, and white blood cells). The centrifuge you have goes from rest to 20,000 rpm in 4.0 s. What is the final angular velocity of the centrifuge? What is the angular acceleration of the centrifuge? How many rotations does the centrifuge go through while it accelerates?

time of 5 rotations (16.5 s) Time of 1 rotation (3.3 s) Distance from shoulder to elbow (20.32cm) Distance from shoulder to middle of hand (56.99cm) ​A. What was the average angular acceleration (degrees/s2and rad/s2) of the hand?  How do you know?​B. What was the average centripetal acceleration (m/s2) of the hand?  (Hint: remember, it is going in a circle and acp = v2/r.)

Olympic ice skaters are able to spin at about 5.0 rev/s.   a. What is their angular velocity in radians per second?  b. What is the centripetal acceleration of the skater’s nose if it is 0.120 m from the axis of rotation in m/s2?  c. An exceptional skater named Dick Button was able to spin much faster in the 1950s than anyone since—at about 9 rev/s. What was the centripetal acceleration of the tip of his nose, assuming it is at 0.120 m radius in m/s2?

In an amusement park ride called The Roundup, passengers stand inside a 19.0 m -diameter rotating ring. After the ring has acquired sufficient speed, it tilts into a vertical plane, as shown in (Figure 1). For help with math skills, you may want to review: Mathematical Expressions Involving Squares For general problem-solving tips and strategies for this topic, you may want to view a Video Tutor Solution of Vertical circle. Figure Rotation axis I 1 of 1 Part B Suppose the ring rotates once every 5.40 s. If a rider's mass is 57.0 kg, with how much force does the ring push on her at the bottom of the ride? Express your answer with the appropriate units. μÅ Value Submit Part C Units X Incorrect; Try Again; 5 attempts remaining Value Submit Previous Answers Request Answer What is the longest rotation period of the wheel that will prevent the riders from falling off at the top? Express your answer with the appropriate units. ■μÅ ? Units Request Answer ?

Part B: How many revolutions does it make before reaching full speed? Express your answer in revolutions using two significant figures.

In an amusement park ride called The Roundup, passengers stand inside a 18.0 m -diameter rotating ring. After the ring has acquired sufficient speed, it tilts into a vertical plane, as shown in ( Figure 1). For help with math skills, you may want to review: Mathematical Expressions Involving Squares For general problem-solving tips and strategies for this topic, you may want to view a Video Tutor Solution of Vertical circle. Figure Rotation axis 0 1 of 1 Part A Suppose the ring rotates once every 4.80 s. If a rider's mass is 59.0 kg, with how much force does the ring push on her at the top of the ride? Express your answer with the appropriate units. Value Submit µÅ Part B Units ? Units input for part A Previous Answers Request Answer X Incorrect; Try Again; 2 attempts remaining Review your calculations and make sure you round to 3 significant figures in the last step. Review Suppose the ring rotates once every 4.80 s. If a rider's mass is 59.0 kg, with how much force does the ring push…

An undiscovered planet, many lightyears from Earth, has one moon in a periodic orbit. This moon takes 20.0 days on average to complete one nearly circular revolution around the unnamed planet. If the distance from the center of the moon to the surface of the planet is 2.420 × 10° km and the planet has a radius of 4.100 × 10³ km, calculate the moon's radial acceleration a. a = m/s? & TOOLS x10

I. Modified Multiple Choices: Write the letter of your choice on the space provided. Then explain or show the solution that justifies your answer. Each item is worth 2 points; correct answers but without solution will gain only 1 point. 1. A particle moves in a circle of radius 1.50 m according to the relation (t)=5t + 3t, where Ois measured in radians and t in seconds. What is the linear speed of the particle after 3.00 seconds? a) 33.0 m/s b) 49.5 m/s c) 54.0 m/s d) 45.0 m/s 2. Refer to #1. What is the tangential acceleration after 3.00 seconds? b) 45.0 m/s² a) 10.0 m/s² c) 30.0 m/s² d) 15.0 m/s² 3. An ice skater spins with arms fully extended. If she pulls her arms closer to her body then (a) the kinetic energy increases (b) the moment of inertia decreases (c) the angular momentum remains constant (d) all of these 4. Juan Tamad is pedalling a bicycle at 10 m/s. Suppose the diameter of the bicycle wheels is 132 cm. What is the angular speed of the wheels? (a) 7.5 rad/s b) 13 rad/s c)…

I Review i Two satellites are in circular orbits around a planet that has radius 9.00 × 10° m. One satellite has mass 68.0 kg, orbital radius 6.00x107 m, and orbital speed 4800 m/s. The second satellite has mass 84.0 kg and orbital radius 5.00x107 m. Part A What is the orbital speed of this second satellite? Express your answer to three significant figures and include the appropriate units. HẢ ? V = Value Units Submit Request Answer

1. A circle has a radius of 10 cms. a) Find the central angle that cuts off an arc length of 17 cms (rounded to the appropriate number of significant digits if you use 3.14 as an approximation of T.) b) Find the central angle that cuts off a sector of area 40 cm2 c) Use the arc length formula to show how velocity is related to angular velocity for circular motion.

An 8.79cm diameter floppy disk rotates at its fastest at 470 rpm.  Part D: What is the angular velocity at the center of the disk?  Part E: If the disk took 3.2 sec to spin up to 470 rpm from rest, what was the average angular acceleration? How many revolutions did the disk complete within this time? What is the net displacement?  Part F: If you turn off the floppy disk drive and the disk comes to a stop in 6.7 s, what is the average angular acceleration for this period of motion?

A toy racecar races along a circular race track that has a radius of 19 meters. The racecar starts at the 3-o'clock position of the track and travels in the CCW direction. Suppose the car has swept out 2.25 radians since it started moving. a. The racecar is how many radius lengths to the right of the center of the race track? radius lengths Preview b. The racecar is how many meters to the right of the center of the race track? meters Preview c. The racecar is how many radias lengths above the center of the race track? radius lengths Preview d. The racecar is how many meters above the center of the race track? meterss Preview

ha body that will guid. What Have I Learned So Far? 1. The circular path of the moon, which has a radius of approximately 3.84 x 105 km, as it revolves around Earth makes the moon complete one revolution in 27.32 days. What is the speed of the moon and its radial acceleration? e circular rack. Solution: is 2. Bodies that are on the surface of Earth are undergoing radial acceleration due to Earth's rotation on its axis. Our planet completes one rotation in 24 hrs and has a radius of about 6371 km. a. What is the radial acceleration of a body found at Earth's equator in m/s2. b. If a certain body will be placed at 25° latitude, compute its radial acceleration. in Action ter edge force. Solution: move

Mark bought a pizza of a radius of 0.5 m. A fly lands on the pizza and walks around the edge for a distance of 80 cm. What is the angular displacement of the fly?

In this problem you will measure the gravitational constant in a series of “observational experiments,” making use of Newton’s law of gravitation and second law of motion as well as Kepler’s third law of planetary motion a)Since measuring the centripetal acceleration of an orbiting body is rather difficult, an alternative approach is to use the body’s rotational period instead. Enter an expression for the gravitational constant, in terms of the distance between Earth and the moon, RME, Earth’s mass,ME, and the moon’s period of rotation around Earth, T.  b)Using the expression you entered in part (b) and taking the rotational period of the moon to be T = 27.1 days, what value would Newton have calculated for the gravitation constant, in units of N⋅m2/kg2? Take ME = 5.95×1024 kg and RME = 3.86×108 m. c) Suppose a rocket is launched as described in part (d) with an initial speed of vi = 494 m/s and attains a peak altitude of H = 12.7 km above the surface of Earth. Taking ME = 5.95×1024 kg…

In an amusement park ride called The Roundup, passengers stand inside a 19.0 m -diameter rotating ring. After the ring has acquired sufficient speed, it tilts into a vertical plane, as shown in ( Figure 1). For help with math skills, you may want to review: Mathematical Expressions Involving Squares For general problem-solving tips and strategies for this topic, you may want to view a Video Tutor Solution of Vertical circle. Figure Rotation axis 1 of 1 > Suppose the ring rotates once every 5.30 s. If a rider's mass is 58.0 kg, with how much force does the ring push on her at the top of the ride? Express your answer with the appropriate units. Value Submit Part B μÀ Value Part C Request Answer Suppose the ring rotates once every 5.30 s. If a rider's mass is 58.0 kg, with how much force does the ring push on her at the bottom of the ride? Express your answer with the appropriate units. μÅ Units Submit Request Answer Units μА ? ? What is the longest rotation period of the wheel that will…

QUESTION 10 Different situation now. You re out in space, on a rotating wheel-shaped space station of radius 1249 m. You feel planted firmly on the floor , due to artificial gravity. The gravity you experience is Earth-normal, that is, g = 9.81 m/s^2. How fast is the space station rotating in order to produce this much artificial gravity? Express your answer in revolutions per minute (rpm).   A 110.7 rpm   B 0.508 rpm   C 0.846 rpm   D 0.089 rpmA

Calculate the magnitude of the acceleration of a bicycle at the instant when one of its wheels rotates at 12 rad/s (radians per second); the radius of the wheel is 0.4meters. A.) a =- 3 rad/s2 B.) a = 57.6 rad/s2 C.) a = 7 rad/s2 D.) a = 9 rad/s2

time. Kinematics 2: Motion in 2-Dimensions and 3-Dimensions 24. An object is being spun at the end of a rope 030 m long and is in a uniform circular motion. In 2 s, the object was able to complete 3 revolutions. Determine the object's tangential speed. 25. An object is being spun at the end of a rope 0.30 m long and is in a uniform circular motion. In 2 s, the object was able to complete 3 revolutions. Determine the object's angular frequency.

Angular velocity question: You are driving on the interstate and need to pass a large truck on a hill. As you try to pass, your car shifts into a lower gear so that you can increase your speed. You look down at your tachometer and see that your car is turning 4,500 RPM. What is the angular velocity in units of radians per second?

Figure 1 shows a 100 g pick revolving around at 200 rpm on a 20-cm-radius circle on a frictionless table. A string attached to the puck passes through a hole in the middle of the table. The end of the string below the table is then slowly pulled down until the puck is revolving in a 15-cm-radius circle  how many revolutions per minute does the puck make at this new radius?

You are given the rate of rotation of a wheel as well as its radius. Determine the following. (Express your answers in terms of T.) 2520°/sec; r = 52 cm (a) angular speed, in units of radians/sec radians/sec (b) linear speed, in units of cm/sec, of a point on the circumference of the wheel cm/sec (c) linear speed, in cm/sec, of a point halfway between the center of the wheel and the circumference cm/sec

A Ferris wheel has a radius of 30 m and its centre is 32 m above the ground. It rotates once every 48 s. Ethan gets on the Feris wheel at the lowest point and then the wheel starts to rotate. The amount of time it takes Ethan to reach 38 m above the ground for the first time, to the nearest tenth of a second, is S. Your answer

Suppose that a bike is being peddled so that the front gear with radius r=4.0 inches, is turning at a rate of 65 rotations per minute. Suppose the back gear has a radius of 1.50 inches and the wheel is 13.5 inches. What is the speed of the bike in miles per hour? (round to the nearest integer. Recall: 1 miles = 5280 feet, 1 hour =60 minutes) C