PART - 1 CH - 1 Units and Measurements — Physics STD 11 Science — Question

All reversible heat engines working at the same temperatures have the same efficiency.

To balance concurrent forces, the sum of components of forces along any axis (direction) should not be zero.

Read each statement below carefully and state, with reasons, if it is true or false:
The velocity vector of a particle at a point is always along the tangent to the path of the particle at that point.

Read statement below carefully, and state, with reasons, if it is true or false:
For perfect rolling motion, work done against friction is zero.

The motion of an arrow released from a bow is on a parabolic path.

In circular motion a body can be accelerated without increasing or decreasing its speed.

Negative work causes slowing down of the motion of the object. Work doesn't depend on time.