A body of mass 1 kg initially at rest

Asked by admin @ 17/08/2021 in Physics viewed by 312 People

A body of mass 1 kg initially at rest explodes and breaks into three fragments of masses in the ratio of 1:1:3. The two pieces of equal mass fly off perpendicular to eah other with a speed of 30m/s. What is the velocity of the heavier fragment?

Answered by admin @ 17/08/2021

Masses of fragments: 1/5 * 1kg, 1/5* 1kg, 3/5 * 1kg
ie., 0.2 kg, 0.2 kg, 0.6 kg

Linear momentum of theirs:
0.2 * 30 m/s = 6 kg-m/s, 6 kg-m/s, 0.6 * v kg-m/s

The vector sum of the first two : 6√2 kg-m/s as they two linear momenta are perpendicular. This will be in North East direction, if the two pieces fly off in North and East directions respectively.

So linear momentum of the large piece is in the direction of South West direction as Linear momentum of all three pieces is 0 (as before explosion).

Velocity of the third piece = 6√2 kg-m/s / 0.6 kg = 10√2 m/s
in South West dir.

A hair dryer with a resistance of 9.6 ohms operates at 120 volts for 2.5 minutes. the total electrical energy used by the dryer during this time interval is

Asked by maham237 @ 13/01/2021 in Physics viewed by 1204 persons

Mind map for light reflection and refraction class 10

Asked by admin @ 23/08/2021 in Physics viewed by 1146 persons

The african cicada is the world's loudest insect, producing a sound intensity level of 107 db at a distance of 0.50 m. what is the intensity of its sound (in w/m2) as heard by someone standing 3.1 m away? express your answer in watts per meter squared.

Asked by maham237 @ 10/01/2021 in Physics viewed by 1099 persons

A thief runs at a speed of 10m s

Asked by admin @ 23/08/2021 in Physics viewed by 1095 persons

A 5.8 x 10 4 watt elevator motor can lift

Asked by maham237 @ 20/06/2021 in Physics viewed by 1080 persons

A body of mass 1 kg initially at rest

Similar Questions

A body of mass 5 kg initially at rest

A body of mass 2 kg initially at rest

A body of mass 5m initially at rest explodes

Three identical point masses each of mass 1 kg

Body a of mass 4m moving with speed u

A 20 kg block is initially at rest

A body of mass 2kg is at rest

A solid sphere of mass 2 kg is resting

A shell of mass 20 kg at rest explodes

A bomb of mass 16 kg at rest explodes

A block a with mass 100 kg is resting

A boat of mass 40 kg is at rest

An object a of mass 1 kg is projected vertically

Infinite number of bodies each of mass 2kg

Uncertainty of mass in kg

Most viewed questions in Physics

Jeevandeep health and physical education std 10 answers pdf

Hc verma physics class 9 solutions of describing motion

How to leave nightmare land answer key

Base area and stability of some objects with different shapes

Which of the following statements about safe lifting are correct

Porous water-absorbing mass of fibers

Absorption of water by filter paper is due to

A composite wire of uniform diameter 3mm

At a distance l 400m from the traffic light

A rocket of mass m is launched straight up with thrust f⃗ thrust.

A hair dryer with a resistance of 9.6 ohms operates at 120 volts for 2.5 minutes. the total electrical energy used by the dryer during this time interval is

Mind map for light reflection and refraction class 10

The african cicada is the world's loudest insect, producing a sound intensity level of 107 db at a distance of 0.50 m. what is the intensity of its sound (in w/m2) as heard by someone standing 3.1 m away? express your answer in watts per meter squared.

A thief runs at a speed of 10m s

A 5.8 x 10 4 watt elevator motor can lift