CBSE Class 9 Answered
a car of mass 100kg starts from rest and attains the velocity of 10m/s in 5 second.Calculate the work done by normal reaction of the car?
Asked by somendra_nath | 11 Jan, 2016, 08:50: PM
Expert Answer
The car of mass m is moving in the horizontal direction with acceleration a.
However, the normal reaction acts on the car from the ground and in the vertical direction.
Now, we know that work done is given as dot product of force and displacement.
W = F · s = Fscosθ
Now, the angle between the displacement and the force of normal reaction is θ = 90°.
Therefore, work done is zero. W = Fscos90 = 0.
Answered by Romal Bhansali | 12 Jan, 2016, 12:16: PM
Application Videos
-
Calculation of Work done -1
This video describes the calculation of work done -
Calculation of work done-2
This video describes the calculation of work done when the angle between...
-
Positive, negative and zero work
This video describes the concept of positive, negative and zero work done -
Type of Work Done
This video explains the case study based question based on the concept o...
-
Relation between Work and force
This video explains an Assertion and Reason Question based on Work and f...
Concept Videos
CBSE 9 - Physics
Asked by mailtoparvathyprajith | 06 Feb, 2024, 08:24: PM
ANSWERED BY EXPERTCBSE 9 - Physics
Asked by sadhanaasadhanaa67 | 04 Feb, 2024, 12:27: PM
ANSWERED BY EXPERTCBSE 9 - Physics
Asked by aartilodhi13 | 02 Feb, 2022, 05:18: PM
ANSWERED BY EXPERTCBSE 9 - Physics
Asked by atiquzzaman100 | 21 Oct, 2021, 01:35: PM
ANSWERED BY EXPERTCBSE 9 - Physics
Asked by harikishortomar | 03 Jan, 2021, 10:52: PM
ANSWERED BY EXPERT
CBSE 9 - Physics
Asked by Deepak | 06 Jul, 2020, 06:23: PM
ANSWERED BY EXPERTCBSE 9 - Physics
Asked by ashabhardwaj490 | 27 Jan, 2020, 06:17: AM
ANSWERED BY EXPERTCBSE 9 - Physics
Asked by kavitavinaysharma | 23 Jan, 2020, 10:05: PM
ANSWERED BY EXPERTCBSE 9 - Physics
Asked by Yasmeenalisha10 | 10 Dec, 2019, 12:34: PM
ANSWERED BY EXPERT
