Advertisements
Advertisements
Question
Calculate the kinetic energy of a body of mass 0.1 kg. and momentum 40kg m/s.
Advertisements
Solution
K.E. = `1/2`mv2 and momentum P = mv
Eliminating v, K.E. =`1/2"m"xx("P"/"m")="P"^2/(2"m")`
Given : P = 40 kg m/s, m = 0.1 Kg.
K.E. = `(40)^2/(2xx0.1)` = 8000 J = 8 × 103 J.
RELATED QUESTIONS
State the energy change in the following device while in use:
A loudspeaker
Select the correct alternatives
A ball rolling on the ground possesses
Name the type of energy (kinetic or potential) possessed by the following:
A stretched rubber band.
Give one relevant example for the following transformation of energy:
Electrical energy to heat energy.
Name the type of energy (kinetic energy K or potential energy U) possessed in the given cases:
A moving bus
State two disadvantages of using nuclear energy for producing electricity.
What kind of energy is possessed in a situation when?
A shooting arrow.
Give one example when:
Mechanical energy changes to electric energy.
Ocean thermal energy is due to
Energy from various sources is considered to have been derived from the sun. Do you agree? Justify your answer.
