Physics, 18.02.2022 14:10 jmdlightsout12345

A car travels with a velocity of 18km/hr, then it accelerates uniformly and travels a distance of 5m. If the velocity reached is 54 km/hr, find the acceleration and the time taken to travel this distance.

Answers: 3

Show answers

Answers

Answer from: nataoli3375

Explanation: Vi = 18k/hr = 18 x 1000/3600 = 5/s

Vf = 54k/hr = 54 x 1000/3600 = 15/s

S = 5

a = ?

t = ?

BY USING NEWTON 3RD EQUATION OF MOTION

2aS= Vf^2-Vi^2

a = Vf^2 - Vi^2/2S

a = 15^2 - 5^2/2(5)

a = 20

BY USING NEWTON 1st EQUATION OF MOTION

Vf = Vi + at

t = Vf-Vi/a

t = 15-5/20

t = 10/20 = 1/2 sec = 0.5 sec

Answer from: Dvrsug8598

The acceleration of the car is 20 m/s²

What is acceleration?

This is the rate of change of velocity. To calculate the acceleration of the car, we use the formula below.

Formula:

v² = u²+2as Equation 1

Where:

v = final velocityu = initial velocitya = acceleration of the cars = distance traveled .

Make a the subject of the equation

a = (v²-u²)/2s Equation 2

From the question,

Given:

u = 18 km/h = (18×1000/3600) = 5 m/sv = 54 km/h = (54×1000/3600) = 15 m/ss = 5 m

Substitute these values above into equation 2

a = (15²-5²)/(2×5)a = (225-25)/10a = 200/10a = 20 m/s²

Hence, The acceleration of the car is 20 m/s².

Learn more about acceleration here:

Answer from: Quest

Velocity=total displacement/timefrom house to store is 500 from store to neighbor is 200 therefore total displacement=500+200=700metrestherefore,700metres/910seconds=0.8metres per second

Answer from: Quest

Answer the above statement is ( false );

Another question on Physics

Physics, 22.06.2019 04:30

Which of the following is not a characteristic of s waves? a. travel slower than p waves. b. cannot be detected in locations more than 105° from an earthquake’s epicenter. c. travel through solids and liquids. d. only affect coastal regions.

Answers: 2

Answer

Physics, 22.06.2019 14:00

Una carga puntual de 3 x 10-6 c se coloca a 12 cm de una segunda carga puntual de - 1,5 x 10-6 c. calcular la magnitud fuerza eléctrica entre las cargas

Answers: 2

Answer

Physics, 22.06.2019 17:00

How many meters will a car travel if its speed is 45 m/s in an interval of 11 seconds? question 2 options: a) 450 meters b) 495 meters c) 4.09 meters d) 498 meters

Answers: 2

Answer

Physics, 22.06.2019 17:30

Describe cytokinesis in plants and animals. in animals: in plants.

Answers: 2

Answer

You know the right answer?

A car travels with a velocity of 18km/hr, then it accelerates uniformly and travels a distance of 5m...

Questions