Define Momentum

Momentum is defined as the quantity of motion. Only moving bodies possess momentum. It is a vector quantity and its direction is same as that of velocity. Momentum is measured as the product of mass and velocity. Momentum of a body is a measure of the …

a ball is dropped from elevator moving upward with an accleration ‘a’ by a boy standing in it . the acceleration of ball with respect to elevator

Divya asks: a ball is dropped from elevator moving upward with an accleration ‘a’ by a boy standing in it . the acceleration of ball with respect to elevator is? (take upward direction positive)

A question from Kinematics.

An object thrown vertically up from the ground passes the height 5m twice in an interval of 10s. What is its time of flight? (Divya asked) Answer: The question seems partial. I am assuming that g= 10 m/s2 and the projection is strictly vertical. The o…

What is circular or rotary motion ? Explain with example.

(This question was originally posted at www.askphysics.com – our initiative to answer the curious questions emerged as a result of genuine thought of children. As the above question did not qualify the criterion to be posted and answered at A…

Gain in momentum of a body starting from rest and moving with a uniform acceleration

A mass of 2 g initially  at Rest Travels for 4 sec with and acceleration of 1.5m/s2.The gain of momentum of the body is: This question was posted by Thushar Goyal. Answer: Taking u = 0 m/s, a= 1.5 m/s2 and t = 4 s calculate v v=u+at =6m/s masss, m = 2…

A problem based on Centre of Mass

Riyou  posted: – “A table is made of a square tabletop of mass M = 10.0 kg and four straight legs each of height h = 80.0 cm and mass m = 3.00 kg attached to the corners of the tabletop. Find the position of the center of mass of the table…

Solution to HC Verma Q-21 of chapter 30

Neha posted this question: “Two large conducting plates are placed parallel to each other with a sepration of 2.00cm between them. an electron starting from rest near one of the plates reaches the other plate in 2.00 microseconds. find the surfac…