Advertisements
Advertisements
Question
A body of mass 60 kg has the momentum 3000 kgm/s-1. Calculate: the speed of the body.
Advertisements
Solution
Mass of body = 60 kg
Momentum, p=3000 kgm/s
Momentum = mass x velocity
3000 = 60 x velocity
Velocity =50 m/s
RELATED QUESTIONS
Work done = Force × ........................................
State the S.I. unit of work and define it.
Find the kinetic energy of a body of mass 1 kg moving with a uniform velocity of 10 m s-1.
Fill in the blank with suitable word :
Work is measured as a product of __________ and __________
A max X goes to the top of a building by a vertical spiral staircase. Another man Y of the same mass goes to the top of the same building by a slanting ladder. Which of the two does more work against gravity and why?
What is the work done against gravity when a body is moved horizontally along a frictionless surface?
A force is applied on a body of mass 20 kg moving with a velocity of 40 ms−1. The body attains a velocity of 50 ms−1 in 2 seconds. Calculate the work done by the body.
A ______ should act on an object.
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
A wind-mill is lifting water from a well.
A uniform chain of length 2 m is kept on a table such that a length of 60 cm hangs freely from the edge of the table. The total mass of the chain is 4 kg. What is the work done in pulling the entire chain on the table?
