Speed is defined as the rate of change of distance moved with time e.g. Speed is a scalar quantity. By scalar, we mean a quantity, which has only magnitude but no proper direction. For example, movement of the body, movement of substances, movement of medicine, or radioisotopes through a body, all refer to some speed. … Read more
Freefall is a special case of motion with constant acceleration because the acceleration due to gravity is always constant and downward. This is true even when an object is thrown upward or has zero velocity. Therefore, the acceleration of a freely falling body is not absolutely uniform, it’s rather constant, due to the acceleration due … Read more
Even if the distance of a body doesn’t change with respect to a point but the position of the body might change. For example, the distance with respect to the center from a body revolving in a circular path doesn’t change. The value of the position vector of the body changes when the direction of … Read more
Differences between Balanced Force and Unbalanced Force. No. Balanced Force Unbalanced Force 1 The forces that act on a body and create equilibrium are called balanced force. The forces that act on a body but don’t create equilibrium are called unbalanced force. 2 In this case, the resultant of the active forces is zero. In … Read more
We can easily walk on the road due to the frictional force between the road and the bottom of our feet. But the frictional force between the road and the bottom of our feet decreases in muddy roads. This is why we slip on those roads. So, it is hard to walk on muddy roads.
If the motion of a moving object is such that it passes repeatedly through a definite point in the same direction in the same manner in a definite interval of time, then this motion is called a periodic motion. Earth revolves around the Sun in the same direction in a parabolic path in every 1 … Read more
When a body rotates about a particular point or a line, keeping the distance of the particles of the body unchanged, it is called circular motion. Earth revolves around sun as it crosses a specific point at specific time that is why earth’s motion is circular motion. Again, Periodic Motion If the motion of a … Read more
An angiogram is a test to find out which arteries supplying the heart have become narrowed. An angiogram uses X-rays to show ‘route maps’ of blood vessels and arteries in the heart. On the other hand, angioplasty is a procedure to expand narrow arteries that may follow on from an angiogram.