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 | 11th 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 | 12th Jan, 2016, 12:16: PM
Application Videos
Concept Videos
- painting is work or not
- science
- Work done does not depend on the distance travelled. Give reason.
- When work is said to be done?
- How do you know that some entity is a form of energy ?
- 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
- in displacing a body 5 metre by a force of 50 Newton the work done is 125 joule find out the angle between the direction of force and displacement
- What is work done?
- A force of 40 Newton acts on a object at an angle of 45 degree with horizontal as a result the object is displaced horizontally through a distance of 14 metres calculate the work done by the force on an object
- Why energy is equal to work done?
Kindly Sign up for a personalised experience
- Ask Study Doubts
- Sample Papers
- Past Year Papers
- Textbook Solutions
Sign Up
Verify mobile number
Enter the OTP sent to your number
Change