1 answer

5. A car moving with a speed of 90 km/hour starts to slow down and in...

Question:

5. A car moving with a speed of 90 km/hour starts to slow down and in 0.5 minutes comes to rest. Find acceleration of the car.
5. A car moving with a speed of 90 km/hour starts to slow down and in 0.5 minutes comes to rest. Find acceleration of the car.

Answers

(5) Initial speed of the car = 90 km/hour

Convert this in m/sec.

90 km/hour = (90 x 1000) / (60 x 60) = 25.0 m/s

Suppose, u = 25.0 m/s

When the car stops, its speed = 0

Suppose, v = 0

Time taken by the car to come at stop, t = 0.5 min = 0.5 x 60 = 30.0 s

Suppose, a = acceleration of the car

Use the expression –

v = u + a*t

put the values-

0 = 25.0 m/s + a*30.0 s

=> a = -25.0 / 30 = -0.83 m/s^2

So, acceleration of the car = 0.83 m/s^2.

The negative sign of acceleration shows that the car is slowing down.

.

Similar Solved Questions

1 answer
Exercise 1.44 Part A: Given two vectors A = 4.00i + 7.00j and B = 5.00i...
Exercise 1.44 Part A: Given two vectors A = 4.00i + 7.00j and B = 5.00i - 2.00j Find the vector product A x B (expressed in unit vectors). Express your answer in terms of the unit vectors I, j, and k. Express your answer using three significant figures. Part B: What is the magnitude of the vector pr...
1 answer
Question 1: Consider the perfectly competitive market for notebooks. The market price for a notebook is...
Question 1: Consider the perfectly competitive market for notebooks. The market price for a notebook is $1.50 and the cost functions are: TC(q) = 10 +.019+.19 MC(q) = .02q +.1 a) Find the profit-maximizing quantity of notebooks produced by a firm in this market. Also, calculate the profit each firm ...
1 answer
The following question is based on scenario 2: Researchers are interested in seeing how sitting for...
The following question is based on scenario 2: Researchers are interested in seeing how sitting for long periods of time can influence cardiovascular health. They ask people how many hours per day they sit, and then they measure their blood pressure to see if they are associated. They expect that as...
1 answer
Question 18 (1.5 points) A tax professional who believes a client's preferred tax position is reasonable...
Question 18 (1.5 points) A tax professional who believes a client's preferred tax position is reasonable finds info support that opinion. This is an example of which common psychological bias? n to Availability bias Anchoring and adjustment Confirmation bias Hindsight bias Question 19 (1.5 point...
1 answer
A 160 g block of aluminum heated to 120 °C is dropped into a 350 g...
A 160 g block of aluminum heated to 120 °C is dropped into a 350 g copper calorimeter container containing 420 g of water. If the initial temperature of the calorimeter and the water is 25.0°C, what is the final equilibrium temperature of the system?...
1 answer
(1 point) Find the QR factorization of M = [ -3 -5 il -6 -7 -7...
(1 point) Find the QR factorization of M = [ -3 -5 il -6 -7 -7 | L-6 -4 2]...
1 answer
P9-17 (similar to) restaul Thematic of the bond 31. 05, and the marke d Rotated to...
P9-17 (similar to) restaul Thematic of the bond 31. 05, and the marke d Rotated to Checkpoint 2.2 and Checkpoint Bond valuation relationships) The 15 year $1.000 par value bonds of Wisco Industries pay percent Yold to maturity on a comparable bond is percent Compute the bond's yield to maturity ...
1 answer
What is happening in the heart during nonperfusing ventricular tachycardia. Be sure to address what is...
what is happening in the heart during nonperfusing ventricular tachycardia. Be sure to address what is happening in the conduction system, how that affects the cardiac cycle (particularly stroke volume) and why that results in poor tissue perfusion. Why is this life-threatening? What does defibrilla...
1 answer
YouTube Maps Course Home Cengage WileyPLUS New Tab IS WileyPLUS: MyWileyPLUS I Help Weygandt, Financial and...
YouTube Maps Course Home Cengage WileyPLUS New Tab IS WileyPLUS: MyWileyPLUS I Help Weygandt, Financial and Managerial, 3e Contact Us INTRODUCTION TO ACCOUNTING (ACCT 200 Practice Assignment Gradebook ORION Downloadable eTextbook signment CALCULATOR MESSAGE MY INSTRUCTOR FULL SCREEN PRINTER VERSION ...
1 answer
Given the equation x=at^p, where x is position, a is acceleration and t is time, what...
Given the equation x=at^p, where x is position, a is acceleration and t is time, what should b be for this equation to be dimensionally accurate? Answers: A p=3 b p=2 C p=-2 D p=-1/2...
1 answer
Please answer the 3 following questions: QUESTION 7 The meaning of interdependence in a monopolistically competitive...
Please answer the 3 following questions: QUESTION 7 The meaning of interdependence in a monopolistically competitive market is that firms will not take into account the reaction of rival firms. that it is difficult for firms to get together to collude. that products produced by firms will be good s...
1 answer
Total heat exchange = Qiron + Qwater = 0 Qiron = (462 J/K) + (T -...
Total heat exchange = Qiron + Qwater = 0 Qiron = (462 J/K) + (T - 352*C) and Qwater = (167.6 J/K) + (T - 20*C) [(462 J/K) + (T - 352*C)] + [(167.6 J/K) + (T - 20*C)] =0 629.6 J/K + (T - 263.621) = 0 At the end they combine the two specific heats. I see that they simply added the 462 and 167.6 to get...
1 answer
Q5 (20 Mark ) Answer the following 1+cOS X a) lim - tan2 x b) Show...
Q5 (20 Mark ) Answer the following 1+cOS X a) lim - tan2 x b) Show that dy {tun-'(see x + lan x)} = { cot-'(esex + cotx)] c) Evaluate if ytan't. and x In(t D) att 1. dx العرب عبر العال مع Google ...
1 answer
The proportion of observations from a standard Normal distribution that take values greater than 1.78 is...
The proportion of observations from a standard Normal distribution that take values greater than 1.78 is about (a) 0.9554. (b) 0.0446. (c) 0.0375. 2...