Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 9 Answered

calculate the amount of work required to stop a car of 1000kg moving with speed of 72km/h
Asked by sadhanaasadhanaa67 | 04 Feb, 2024, 12:27: PM
answered-by-expert Expert Answer

72 km/hr = 72 × (5/18) m/s = 20 m/s

Let m be mass and v be velocity of car.

Kinetic energy = (1/2) m v2 = 0.5 × 1000 × 20 × 20 = 2 × 105 J

Work done to stop the vehicle = Kinetic energy of vehicle.

Work done to stop the vehicle = 2 × 105 J

Answered by Thiyagarajan K | 05 Feb, 2024, 08:40: AM

Application Videos

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
CBSE 9 - Physics
If person A reaches the 2nd floor Of a shopping mall by lift and Person B reaches the same floor by stairs and both their masses are same. Is work done by person B is greater than Person A  against gravitational force.Justify your answer
Asked by mailtoparvathyprajith | 06 Feb, 2024, 08:24: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
calculate the amount of work required to stop a car of 1000kg moving with speed of 72km/h
Asked by sadhanaasadhanaa67 | 04 Feb, 2024, 12:27: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
an object thrown at a certain angle to the ground moves in a second path and falls back to the ground the initial and the final point of the path of the object lies on the same horizontal line what is the work done by the force of gravity on the object?
Asked by aartilodhi13 | 02 Feb, 2022, 05:18: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
A car of mass 2 kg is moving with speed of 10m/s.  Calculate work done to stop it ?
Asked by atiquzzaman100 | 21 Oct, 2021, 01:35: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
painting is work or not
Asked by harikishortomar | 03 Jan, 2021, 10:52: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
science
question image
Asked by varadaawasekar | 08 Oct, 2020, 02:16: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
Work done does not depend on the distance travelled. Give reason.
Asked by Deepak | 06 Jul, 2020, 06:23: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
When work is said to be done?
Asked by ashabhardwaj490 | 27 Jan, 2020, 06:17: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
How do you know that some entity is a form of energy ?
Asked by kavitavinaysharma | 23 Jan, 2020, 10:05: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
Person A move from ground to third floor of his house through lift and person B do the same job with staircase who has done more job give reason
Asked by Yasmeenalisha10 | 10 Dec, 2019, 12:34: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Get Latest Study Material for Academic year 24-25 Click here
×