Self Studies

Work Energy and Power Test - 1

Result Self Studies

Work Energy and Power Test - 1
  • Score

    -

    out of -
  • Rank

    -

    out of -
TIME Taken - -
Self Studies

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Self Studies Self Studies
Weekly Quiz Competition
  • Question 1
    1 / -0

    The total mechanical energy of a system is conserved if the

    Solution

    Explanation:

    Mechanical energy is the sum of kinetic and potential energy in an object that is used to do work. In other words, it is energy in an object due to its motion or position, or both. In case of conservative forces total mechanical energy remains conserved because potential energy applicable only for conservative forces.

     

  • Question 2
    1 / -0

    Physically, the notion of potential energy is applicable only to

    Solution

    Explanation:

    Potential energy is the stored energy of an object. It is the energy by virtue of an object's position relative to other objects. Potential energy is often associated with restoring forces such as a spring or the force of gravity. It is applicable only for conservative forces.

     

  • Question 3
    1 / -0

    In a graph of F(x) vs x, the area under the curve

    Solution

    Explanation:

    Work done by a variable force is given by 

    W = ∫F(x)dx∫F(x)dx

    above integration gives us area area under F and  x. 

     

  • Question 4
    1 / -0

    The work done by the force is defined to be

    Solution

    Explanation:

    Work done is given by 

    W = (Fcosθ)d

    here Fcosθ is the component of applied force  in direction of displacement and d is magnitude of displacement.

     

  • Question 5
    1 / -0

    In which case is the work done zero?

    Solution

    Explanation:

    Work done is given as

    W = Fdcosθ

    Here θ is the angle between F and d  if both are perpendicular  then θ = 90 degree so cosθ = 0  and thus work done is 0 .

     

  • Question 6
    1 / -0

    The scalar product of two vectors A and B is

    Solution

    Explanation:

    Scalar product means dot product and dot product of 2 vectors gives a scalar  , example  dot product of force and displacement gives work which is scalar

     

  • Question 7
    1 / -0

    The scalar product of two vectors A and B in terms of the projections of the vectors on the x, y and z axis is

    Solution

    Explanation:

    A = Ax i+ Ay j+ Azk

    B = Bx i+ By j+ Bzk

    A. B = (Ax i+ Ay j+ Azk). ( Bx i+ By j+ Bzk) 

    A. B = AxBx + AyB+ AzBz

     

Self Studies
User
Question Analysis
  • Correct -

  • Wrong -

  • Skipped -

My Perfomance
  • Score

    -

    out of -
  • Rank

    -

    out of -
Re-Attempt Weekly Quiz Competition
Selfstudy
Selfstudy
Self Studies Get latest Exam Updates
& Study Material Alerts!
No, Thanks
Self Studies
Click on Allow to receive notifications
Allow Notification
Self Studies
Self Studies Self Studies
To enable notifications follow this 2 steps:
  • First Click on Secure Icon Self Studies
  • Second click on the toggle icon
Allow Notification
Get latest Exam Updates & FREE Study Material Alerts!
Self Studies ×
Open Now