Case 1: A DJ starts up her phonograph player. The turntable accelerates uniformly from rest, and takes t1 = 10.8 seconds to get up to its full speed of f1 = 78 revolutions per minute. Case 2: The DJ then changes the speed of the turntable from f1 = 78 to f2 = 120 revolutions per minute. She notices that the turntable rotates exactly n2= 19 times while accelerating uniformly. Randomized Variables t1 = 10.8 seconds n2 = 19 times a)Calculate the angular speed described in Case 1, given as f1 = 78 revolutions per minute, into units of radians/second. ω1 = b)How many revolutions does the turntable make while accelerating in Case 1? n1 = c)Calculate the magnitude of the angular acceleration of the turntable in Case 1, in radians/second2. α1 =

Q: A force is acting on a block with a magnitude of F = 115 N. The force makes an angle of 0 = 14° with…

A: The free-body diagram of the case can be drawn as follows:Here:Given values:

Q: E. coli cell in 1/10 of a second. If the length of an E. coli cell is 1500 nm, how fast does the…

A: The objective of the question is to find out the speed of a water molecule in miles per hour (mph)…

Q: While the one friend is timing the flight of the ball, you have another friend measuring the…

A: a) In this part we use the formula: v2=2gh⇒v=2gh=2·9.8·21.5=20.53 m/s Hence the initial velocity of…

Q: Part (b) How long, tfin seconds, does the tennis ball move before striking the court? ケ=

A: The tennis ball is struct at a vertical height of 1.95 m above the ground of the tennis court. After…

Q: Susie's experiment to measure the value of g in Northridge produces a result of 8.90 m/s². The…

A: Given data as per question Accepted value =9.80 m/s2

Q: Q. A remote-controlled car is moving in a vacant parking lot. The velocity of the car as a function…

A:

Q: Question 1: The magnitude of the friction force acting on a particle is given by f = -bv². Here, b…

A: The equation for the friction force is given by, f=-bv2 The right hand side and the left hand side…

Q: According https://www.quinnessworldrecords.com/, fastest baseball pitch was delivered by Aroldis…

A: Given data: The final velocity  at which the ball leaves the pitcher's hand, v=46.98 m/s. The…

Q: Case 1: A DJ starts up her phonograph player. The turntable accelerates uniformly from rest, and…

A: Given data: Case: 1 t1 = 10.8 seconds f1 = 78 revolutions per minute Case:2  f1 = 78 revolutions per…

Q: Alishba wakes up late and runs to school, covering a distance of 2.55 km in a direction of [N200 E]…

A: Alishba runs to school, covering a distance of 2.55 km in a direction of [N200 E].She then goes to…

Q: A person uses a set of spring-based analog scales to measure her weight.  He did the weighing…

A:

Q: The position of a moving particle in vortex is expressed as, x(t) = x0 sin(a√t + bt^2) where x0 is…

A: An equation holds correct if the dimensions of the quantities involved in both sides of the equation…

Q: Is there a time when the hiker is 7 miles east of the outhouse?

A: The answer is No. The trail travels in an east-west direction. So the maximum distance to the west…

Q: A cylindrical container is being filled with water at a rate of 10π cubic meters per minute. The…

A: As per guidelines only first question is solved here. Given,Radius of the base, r = 20 mHeight of…

Q: During service, a tennis ball is struck at height h = 1.7 m above a tennis court and moves with…

A: The height is h=1.7 m The velocity formula is, v0=voxi The value of v0x = 28.5 m/s (a) The time…

Q: Problem 8: When you drive to work on a winding road, the odometer of your car changes from 27123 km…

A:

Q: The position-time graph that describes the motion of an object is given as in the figure below. if…

A:

Q: Part A 12 10 3 11.76 4 15.61 8 18.6 6. 22.02 26.23 4 8. 30.92 35.46 10 42.7 10 15 20 25 30 35 40 45…

A:

Q: Problem 5: An athlete crosses a 28 m wide river by swimming perpendicular to the water current at a…

A:

Q: In a time of 2.86 h, a bird flies a distance of 83.7 km in the direction of 32.9 degrees East of…

A: The objective of the question is to find the y-component of the bird's average velocity. The bird's…

Q: a student measures the time of flight of a projectile and gets the following values (in seconds):…

A: A student measures the time of flight of a projectile and gets the following values (in seconds):…

Q: Bob has just finished climbing a sheer cliff above a beach, and wants to figure out how high he…

A:

Q: Problem 1: A car speeds past a stationary police officer while traveling 105 km/h. The officer…

A:

Q: ow did you use the RT equation which is RT= a+ b log2(n

A: Solution: THe reaction time equation is given below, RT=a+blog2n…

Q: FORM 3 PHYSICS REVISION SHEET 5. Two cars, Car A and Car B, participate in a drag race on a straight…

A:

Q: e force F has a magnitude of 740 N. Express F as a vector in terms of the unit vectors i and j.…

A: The magnitude of the force is defined as the sum of all the forces acting on an object. Force…

Q: t Ө N Radar "dish" A radar station detects an airplane approaching directly from the east. At first…

A: Here, we can initialize a coordinate system with +x in eastward direction and +y in upward…

Q: In a time of 2.86 h, a bird flies a distance of 83.7 km in the direction of 32.9 degrees East of…

A: The objective of the question is to find the x component of the bird's average velocity. The bird's…

Q: Vector A = 7.2 i + 2.6 j. Vector B = 7.5 i + 7.4 j. The magnitude of the cross product i.e. |AxB|…

A:

Q: The natural (Plank) Unit of a physical quantity Q has the form: {Q}Plank= ħnlcn²Gn3 where: the Plank…

A: As per guideline we are suppose to do one from multiple unrelated questions, please post them…

Q: X

A:

Q: You have measured the time it takes for a ball to drop as t= 1.898 seconds. You estimate a probable…

A: We are  given the time taken by ball to drop. We are also given error in the measurement of that…

Q: Problem 1: A runner runs around a circular track. He completes one lap at a time of t = 260 s at a…

A:

Q: Problem 1: Equations describing forces and their magnitudes on the figure beneath are the following:…

A: A figure showing 3 forces we need to find out which of the following statements are true

Q: A person uses a set of spring-based analog scales to measure her weight.  He did the weighing…

A: The various measurements of weights of the person in kilograms is given as, 60.1 kg,59.6 kg,59.4…

Q: Q10: Assume the equation x = At³ + Bt describes the motion of a particular object, with x having the…

A:

Q: What was the car's instantaneous velocity in the horizontal direction, in meters per second, when it…

A: Given that,t2=6 sd=22 mt1=16 s

Q: Problem 9: A car travels a distance d = 20.5 m in the positive x-direction in a time of t = 16.5 s.…

A: d = 20.5 m t1 = 16.5 s t2 = 7 s

Q: The curve is described by V(t)=Vm*sin(w*t+theta). Given V1=21, V3=7.518 volts, V2=-V1, and T=5.5…

A:

Q: In Michael Johnson's world-record 400 mm sprint, he ran the first 100 mm in 11.20 ss; then he…

A:

Q: During service, a tennis ball is struck at height h = 1.95 m above a tennis court and moves with…

A: Given height h = 1.95 velocity v0 =  Vox i Randomized Variables h= 1.95 m Vox = 25.5 m/s And we…

Scalars and Vectors

Scalars and Vectors are the classification of physical quantities that are used to denote various terms in physics.