Advertisements
Advertisements
प्रश्न
How fast should a boy weighting 30 kg run so that his kinetic energy is 375 joule?
संख्यात्मक
Advertisements
उत्तर
We know that , K.E = `1/2` mv2
375 = `1/2` x 30 x v2
or v2 = `(375 xx 2)/30` = 25 m/s
or v = 5 m/s
shaalaa.com
या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
APPEARS IN
संबंधित प्रश्न
The moon is revolving around the earth in a circular path. How much work is done by the moon?
A force of 50 N acts on a body and moves it a distance of 4 m on horizontal surface. Calculate the work done if the direction of force is at an angle of 60° to the horizontal surface.
Write an expression for the work done against gravity.
What type of energy is possessed by a flowing water?
Name the parameters that can change the K.E.
Name the type of energy possessed by a body due to a change in configuration.
Does the total energy of a body always remain constant?
What is meant by power?
Give an example
Electrical energy changes to heat energy.
Find the kinetic energy of a car of mass 1000 kg traveling at 72 km/h.
