Week 5 Fall 2019 Two person race with acceleration and deceleration 14 of 15 IReview | Constants Mary and Sally are in a foot race (see figure (Figure 1)). When Mary is 22 m from the finish line, she has a speed of 4.0 m/s and is 5.0 m behind Sally, who has a speed of 5.0 m/s. Sally thinks she has an easy win and so, during the remaining portion of the race, decelerates at a constant rate of 0.44 m/s2 to the finish line. Part A What constant acceleration does Mary now need during the remaining portion of the race, if she wishes to cross the finish line side-by- side with Sally? Express your answer using two significant figures. View Available Hint(s) ανα ΑΣφ VA D m/s2 а 3 a = Figure 1 of 1 Submit Finish Mary Sally Provide Feedback Next 5.0 m/s 4.0 m/s 5.0 m 22 m

Question
Week 5 Fall 2019
Two person race with acceleration and deceleration
14 of 15
IReview | Constants
Mary and Sally are in a foot race (see figure (Figure 1)).
When Mary is 22 m from the finish line, she has a speed
of 4.0 m/s and is 5.0 m behind Sally, who has a speed of
5.0 m/s. Sally thinks she has an easy win and so, during
the remaining portion of the race, decelerates at a
constant rate of 0.44 m/s2 to the finish line.
Part A
What constant acceleration does Mary now need during the remaining portion of the race, if she wishes to cross the finish line side-by-
side with Sally?
Express your answer using two significant figures.
View Available Hint(s)
ανα ΑΣφ
VA D
m/s2
а 3
a =
Figure
1 of 1
Submit
Finish
Mary
Sally
Provide Feedback
Next
5.0 m/s
4.0 m/s
5.0 m
22 m
Expand
Transcribed Image Text

Week 5 Fall 2019 Two person race with acceleration and deceleration 14 of 15 IReview | Constants Mary and Sally are in a foot race (see figure (Figure 1)). When Mary is 22 m from the finish line, she has a speed of 4.0 m/s and is 5.0 m behind Sally, who has a speed of 5.0 m/s. Sally thinks she has an easy win and so, during the remaining portion of the race, decelerates at a constant rate of 0.44 m/s2 to the finish line. Part A What constant acceleration does Mary now need during the remaining portion of the race, if she wishes to cross the finish line side-by- side with Sally? Express your answer using two significant figures. View Available Hint(s) ανα ΑΣφ VA D m/s2 а 3 a = Figure 1 of 1 Submit Finish Mary Sally Provide Feedback Next 5.0 m/s 4.0 m/s 5.0 m 22 m

Expert Answer

Want to see the step-by-step answer?

Check out a sample Q&A here.

Want to see this answer and more?

Experts are waiting 24/7 to provide step-by-step solutions in as fast as 30 minutes!*

*Response times may vary by subject and question complexity. Median response time is 34 minutes for paid subscribers and may be longer for promotional offers.
Tagged in
Science
Physics

Kinematics

Related Physics Q&A

Find answers to questions asked by students like you.

Q: 28.66     The wire semicircles shown in Fig. P28.66 have radii a and b.  Calculate the net magnetic ...

A: The required magnitude of magnetic field is,

Q: Two very long wires are parallel to each other separated by a distance d.  The same current flows th...

A: (a) The direction of magnetic field due to a current carrying wire is given by Maxwell’s right hand ...

Q: Hi, I am in physic I and they give me the problem  The earth's radius is 6.37×106m; it rotates once ...

A: The angular deflection between equator and the North Pole is,The radius of the circle at the point b...

Q: What is the difference between gauge pressure and absolute pressure?

A: Gauge pressure and Absolute pressure are two different pressure measure which we will understand in ...

Q: A small cart with low friction wheels is attached to a sturdy wall with a high quality spring that h...

A: The formula for the time period of the oscillation is:

Q: A 85.6 g drink is left on a turntable causing it to turn with an angular speed of 8.20 rad/s. If the...

A: Normal reaction acting on the drink is:

Q: Part D

A: Write the expression for net force in the vertical direction and equate with the Newton’s second law...

Q: The thrust created by a lone jet engine produces a force of F = 78000 N. It takes the aircraft (with...

A: (a)Initial kinetic energy is zero, as it starts from rest.From work energy principle:

Q: boka Flight: Best Course Home whitworth Librene Pirate Port JPublic eal in https://openvellum.ecolle...

A: Part AThe string be stretched by the distance x, it is shown in the below figure.

Q: . What is the gravitational force of attraction between two electrons held onemeter apart in a vacuu...

A: The magnitude of the gravitational force between two bodies of masses m1 and m2 at a distance r apar...

Q: Number 2. I need also the free body diagram for that question.

A: Coefficient of the static friction,The acceleration due to gravity,Radius of the curve road,

Q: In introductory physics laboratories, a typicalCavendish balance for measuring the gravitational con...

A: Gravitational force between two objects is,

Q: X Book a Flight: Best Join conversation Course Home X A-Z Databases whitworth Library Pirate Port | ...

A: Consider that the force applied by the person is “F” which causes tension in the string. The situati...

Q: Question 12

A: Here, the figure shows the motion of the steel ball at an initial velocity u and with the angle θ.

Q: why does nuclear fusion in the sun only occur near the center?

A: Nuclear fusion is a reaction in which two or more atomic nuclei are combined to form one or more dif...

Q: Three cubes, of side L0,2L0, and 3L0, are placed next to one another (in contact) with their centers...

A: Given,Three cubes L0, 2L0, 3L0 are placed next to one another and their centre along a straight line...

Q: 21. As the angle between two concurrent forces decreases from 180°, their resultant (3) remains the ...

A: Resultant force is given by,

Q: Use Gauss's law to derive the formula of capacitance C of a parallel plate capacitor of plate area A...

A: Use the concept of potential and electric field.The equipotential lines and electric field lines are...

Q: A 1,260-N crate is being pushed across a level floor at a constant speed by a force F of 270 N at an...

A: (a)In this case, the crate moves with constant speed.Friction force is equal to the force in horizon...

Q: A 4.4-kg block is pushed 3.5 m up a vertical wall with constant speed by a constant force of magnitu...

A: Given information:Mass of the block (m) = 4.4 kgCoefficient of friction between the block and the wa...

Q: 3 A skater increases her speed uniformly from 2.0 meters second to 7.0 meters second per per over a ...

A: Let v be the final velocity of the skater, u be the initial velocity, a be the acceleration, and s b...

Q: TOnsa What is the power output of the 20 0 resistor if the potential difference between points a and...

A: Let V be the potential difference across point a and b, Req be the equivalent resistance across it, ...

Q: A force of 40.0 N is applied in the positive x-direction to a block of mass 7.65 kg, at rest on a fr...

A: From Newton’s second law of motion.

Q: A student bikes to school by traveling first dN = 1.10 miles north, then dW = 0.300 miles west, and ...

A: Vector showing the displacement in north direction is,

Q: An initially 'compressed' spring (x1 = 0.4m) is observed to compress an additional 0.4 m before stop...

A: Given:Initial compression in the spring = 0.4 mAdditional compression in the spring = 0.4 mFinal com...

Q: Calculate the value of two equal charges if they repel one another with a forceof 0.1N when situated...

A: According to Coulomb’s Law,

Q: A car weighs 9800 N and sits on the hydraulic lift that utilizes a piston with a cross section area ...

A: Click to see the answer

Q: (a) Show that the CM of a uniform thin rod of length / and mass M is at its center. (b) Determine th...

A: (a)Consider lambda be the uniform mass density of the rod.From the definition of center of mass.

Q: An 8.6 kg body undergoes an acceleration of 2.7 m/s2. What is the magnitude of the resultant force a...

A: Given,

Q: A 4600 kg helicopter accelerates upward at 2.0 m/s2. Determine the lift force exerted on the propell...

A: Equation for lift force exerted is

Q: Constants Periodic Table (Figure 1)The car shown in the figure has mass m (this includes the mass of...

A: Part (B)The car has total of 4 wheels, as mentioned in the question. Mass is uniformly distributed o...

Q: A 2.75 kg block on a horizontal floor is attached to a horizontal spring that is initially compresse...

A: From conservation of energy,

Q: The big prediction here is how the masses, the radius, the period, and the angle interrelate. Please...

A: Consider the hanging mass be M, the whirling mass be m, the tangential acceleration of the mass be a...

Q: Could you kindly do the workings for question 4 and solve while typing the explanation to me? Thank ...

A: From Newton’s second law of motion, the net force acting on the system is:

Q: Calculate the angular velocity of the Earth in its orbit around the Sun. Express your answer using t...

A: a) The Earth takes 365 days to complete one trip around the Sun that is, 2π radians.Write the formul...

Q: What happens when the book stops moving?

A: The friction is classified into many types. A book moving across the desk is an example of sliding f...

Q: A 5.8 × 105 kg train is brought to a stop from a speed of 0.85 m/s in 0.57 m by a large spring bumpe...

A: If the spring gets compressed by a distance of ‘x’ and its force constant is k, its elastic potentia...

Q: I have attached the question, could you kindly solve it and explain it to me?

A: The free body diagram of both the blocks are given below, 

Q: A rocket is launched straight up with constant acceleration. Four seconds after liftoff, a bolt fall...

A: Click to see the answer

Q: A straight wire produces magnetic field of 1 micro Tesla at a distance 2m. How much current is passi...

A: Click to see the answer

Q: An “infinitely” long wire is bent into the shape seen below.  It carries a current of 14 Amps in the...

A: Given values:Current in the wire, I = 14 ARadius of the curved part of the wire, a = 3.0 cm = 0.03 m...

Q: if a 33 g object has a volume of 47 cm3, would you expect it to sink or float in water ? Why?

A: Given:Mass of the object = 33 gVolume of the object = 47 cm3

Q: N4T.1 Aweight hangs from a string but is pulled to one side by a horizontal string, as shown. The te...

A: Write the expression for net force acting on the weight in the vertical direction

Q: A solid sphere is roling on a surface. What fraction of its total kinetic energy is in the form of r...

A: Click to see the answer

Q: A flywheel with a diameter of 1.81 m is rotating at an angular speed of 197 rev/min.  (a) What const...

A: (a)The formula for the final angular velocity in term of the constant angular acceleration and time ...

Q: 36. In a thundercloud, there may be electric charges of +40.0 C near the top of the cloud and -40.0 ...

A: The charge at the top is +4.0C, the charge at bottom is -4.0C, and the distance of separation is 2km...

Q: 12. QCA block of mass 3.00 kg is pushed up against a wall by a force P that makes an angle of 0 50.0...

A: (a)Write the equilibrium condition for the vertical direction of force.Write the equilibrium conditi...

Q: A bag of oranges weighs 3.00 lb on Earth. What would it weigh on the Moon, where the free-fall accel...

A: Mass is a physical quantity that doesn’t vary when moved from on planet to another planet.The formul...

Q: A planet similar to the Earth has a radius 4.3 × 106 m and has an acceleration of gravity of 10 m/s ...

A: Normal acceleration will be same as acceleration due to gravity of the planet.For an object to be in...

Q: we didn't rgy-we ou have a hen it is d does it g force. al to the force. that Seq FIGURE 9.17 Proper...

A: The answer is with respect to this link:https://www.bartleby.com/questions-and-answers/e-slope-10o-1...